
Master Lock MLK6321 ProSeries® Shrouded Shackle Padlocks
Master Lock MLK6321 ProSeries® Shrouded Shackle Padlocks
Over 5000 happy customers
Free delivery over £100
Buy Now Pay Later
24/7 Support
Master Lock MLK6321 ProSeries® Shrouded Shackle Padlocks
Master Lock MLK6321 ProSeries® Shrouded Shackle Padlocks
SKU : MLK6321KA1
Premium Quality Guaranteed
Lightning-Fast Delivery
Hassle-Free Returns
Approved UK Supplier
Couldn't load pickup availability
Over 5000 happy customers
Free delivery over £100
Buy Now Pay Later
24/7 Support
Over 5000 happy customers
Free delivery over £100
Buy Now Pay Later
24/7 Support


Share



Introducing the Master Lock MLK6321 ProSeries® Shrouded Shackle Padlocks, the ultimate solution for those seeking uncompromised security. Engineered for the most demanding environments, these shrouded shackle padlocks are built to withstand corrosion, abuse, and brute force attacks, making them a top choice in the padlocks category. With a robust construction featuring a tough boron alloy shackle and a dual ball bearing locking mechanism, this padlock offers exceptional pry resistance, ensuring your valuables remain secure.
Key Features and Benefits:
- Durable Materials: Made from premium boron alloy, designed for maximum strength and longevity.
- Enhanced Security: The dual ball bearing locking mechanism provides unparalleled resistance against tampering.
- Corrosion Resistance: Crafted to endure the elements, perfect for outdoor use.
- Shrouded Shackle Design: Minimizes exposure to cutting and sawing, offering an extra layer of protection.
Whether you're securing gates, storage units, or high-value equipment, the Master Lock padlock is your reliable partner. Unlike typical padlocks, this model stands out due to its advanced security features and resilient design, making it an essential tool for anyone serious about safety. Elevate your security measures today with the Master Lock MLK6321, where peace of mind meets unmatched durability.
Don’t wait until it’s too late—secure your belongings with the Master Lock ProSeries® Shrouded Shackle Padlock now!
Our customers tell it better than we do!
Excellent
4.8/ 5
based on 23,632 reviews
Super Fast Delivery Rocks! 🚚⚡
I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze. I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze. I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze.
Jason
Awesome Support, Great Tools! 📞🛠️
ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day. ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day. ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day.
Dan
Quick Shipping, Happy Me! 📦😊
ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful. ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful. ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful.
Paul
Love the Service Here! ❤️👍
ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with. ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with. ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with.
Glen
Fast, Friendly, Fantastic Tools! 🌟🔧
My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with. My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with. My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with.
Haran
Best Shopping Experience Ever! 🛒🎉
ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job. ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job. ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job.
Charles
Fantastic Tools, Great Price! 💪£
I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with. I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with. I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with.
Luke
Super Fast Delivery Rocks! 🚚⚡
I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze. I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze. I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze.
Jason
Awesome Support, Great Tools! 📞🛠️
ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day. ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day. ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day.
Dan
Quick Shipping, Happy Me! 📦😊
ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful. ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful. ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful.
Paul
Love the Service Here! ❤️👍
ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with. ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with. ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with.
Glen
Fast, Friendly, Fantastic Tools! 🌟🔧
My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with. My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with. My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with.
Haran
Best Shopping Experience Ever! 🛒🎉
ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job. ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job. ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job.
Charles
Fantastic Tools, Great Price! 💪£
I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with. I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with. I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with.
Luke
Super Fast Delivery Rocks! 🚚⚡
I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze. I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze. I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze.
Jason
Awesome Support, Great Tools! 📞🛠️
ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day. ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day. ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day.
Dan
Quick Shipping, Happy Me! 📦😊
ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful. ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful. ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful.
Paul
Love the Service Here! ❤️👍
ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with. ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with. ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with.
Glen
Fast, Friendly, Fantastic Tools! 🌟🔧
My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with. My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with. My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with.
Haran
Best Shopping Experience Ever! 🛒🎉
ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job. ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job. ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job.
Charles
Fantastic Tools, Great Price! 💪£
I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with. I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with. I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with.
Luke
Super Fast Delivery Rocks! 🚚⚡
I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze. I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze. I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze.
Jason
Awesome Support, Great Tools! 📞🛠️
ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day. ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day. ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day.
Dan
Quick Shipping, Happy Me! 📦😊
ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful. ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful. ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful.
Paul
Love the Service Here! ❤️👍
ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with. ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with. ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with.
Glen
Fast, Friendly, Fantastic Tools! 🌟🔧
My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with. My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with. My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with.
Haran
Best Shopping Experience Ever! 🛒🎉
ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job. ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job. ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job.
Charles
Fantastic Tools, Great Price! 💪£
I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with. I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with. I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with.
Luke
Super Fast Delivery Rocks! 🚚⚡
I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze. I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze. I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze.
Jason
Awesome Support, Great Tools! 📞🛠️
ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day. ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day. ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day.
Dan
Quick Shipping, Happy Me! 📦😊
ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful. ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful. ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful.
Paul
Love the Service Here! ❤️👍
ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with. ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with. ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with.
Glen
Fast, Friendly, Fantastic Tools! 🌟🔧
My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with. My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with. My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with.
Haran
Best Shopping Experience Ever! 🛒🎉
ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job. ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job. ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job.
Charles
Fantastic Tools, Great Price! 💪£
I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with. I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with. I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with.
Luke
Super Fast Delivery Rocks! 🚚⚡
I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze. I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze. I ordered from ToolEmpire and was amazed by the speedy delivery! The product arrived in perfect condition. It’s affordable, high-quality, and their team made shopping a breeze.
Jason
Awesome Support, Great Tools! 📞🛠️
ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day. ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day. ToolEmpire’s customer service is top-notch! I got help in minutes! My tools arrived fast and work flawlessly. They’re well-priced, sturdy, and so easy to use every day.
Dan
Quick Shipping, Happy Me! 📦😊
ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful. ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful. ToolEmpire delivered my order faster than I expected, such a relief! The product is fantastic and budget-friendly. It’s reliable, and their support team was super helpful.
Paul
Love the Service Here! ❤️👍
ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with. ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with. ToolEmpire’s support team answered all my questions so quickly! Delivery was lightning-fast too. The tools are affordable, durable, and a total joy to work with.
Glen
Fast, Friendly, Fantastic Tools! 🌟🔧
My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with. My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with. My ToolEmpire order came in record time! Couldn’t believe it! Customer service was brilliant. The products are cost-effective, strong, and really simple to get started with.
Haran
Best Shopping Experience Ever! 🛒🎉
ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job. ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job. ToolEmpire shipped my tools super fast, and their support was amazing! Everything arrived spot-on. It’s great value, top quality, and so user-friendly for any job.
Charles
Fantastic Tools, Great Price! 💪£
I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with. I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with. I had doubts about moving from my old supplier, but ToolEmpire changed my mind! Their products are wallet-friendly and incredibly powerful. The quality shines, and they’re easy to work with.
Luke