Master LockPro Series Hidden Shackle Padlocks, Keyed Alike 6271NKA-4 w/BumpStop Technology

These locks work well and they seem strong. Before buying, I saw some other reviews that mentioned that the logo is turned sideways on these locks, and I was worried that the key opening would be on the side. The key opening is perfect for what I'm doing -- see the attached pictures.

The bump key protection tests well. It would be easier to destroy the door than to get through these padlocks.

It’s a great lock that serves it purpose. I would have gave it 5 starts but one of the locks the key constantly gets stuck in it. It’s small complaint but it’s aggravating when it does it everyday.

Works great, used as what it was intended for.

Very good product, highly recommended for added safety to whatever you are trying to secure.

I bought a 2 pack of these to replace a lock on my shed that was ripped off. When I got them in I tested them on my Horton Hauler trailer and they worked fine with no modification so I bought another 3 pack for the trailer. I bought 2 of the "Master Lock 730DPF Heavy Duty Hasp, Straight Bar, 7-1/4-inch" for the shed. I believe the hasp will rip out of the door or the screw holes before this lock gives out. I will replace the screws with bolts or replace the hasps with the "Master Lock Hasp, Solid Steel Hidden Hasp, 9 in. Wide, 770" for better security. Only real complaint is that the key tends to stick a little and is not a smooth process as is normal with all of my past Master Locks, and this is the case with all 5 locks. Aside from that I love these and would recommend them to anyone looking for a heavy duty high security lock. The shed tends to get broken into once a year so I will post an update if that should happen.

These are great locks, and they work very well. However, they are not keyed alike and one of the lock's key is cut just different enough that it won't work.

I'm not very impressed with Master lock

All keyed the same.