2-7/8 Inch Heavy Duty Solid Steel Hockey Puck Padlock with Hardened Reinforced Shackle for Superior Cut Resistance.Hidden Shackle Design Resists Pulling and Prying, Chrome Finish, 5373-3, Gray

I bought this to use with a Blaylock TL-33. I purposely avoided Master, Trimax and Peaktow from a lock integrity point of view. It turned out that the shackle opening was a bit too small (about 1/4") to fit the rod from the trailer lock. After I ground down the rod a bit, it worked well. I wish the puck lock was flat backed {notched at bottom likely for hasp). There's only one picture posted in the item description and I didn't notice that when I ordered it. But it still works well, and I could always find some metal to fill that gap later. Lock is hefty and appears to be good quality. Lock tumbler is brass so should hold up okay to the elements. Overall. It looks like a very good product.

This is a nice upgrade from padlock, but it still has a regular key hole, so its not impenetrable. Still, its just a bit better security than the usual padlock that can be taken off with a quick snip of the bolt cutters.

Great locks. Wish I had got another pack at same time. I ordered two packs. Shipper was good enough to send keyed alike.

Good quality.

I wanted a high security lock and hasp for a storage cabinet I built. I bought this lock and the Master Lock Puck hasp. They fit together perfectly. This lock is really heavy and impressive!I'm no lock expert, but I do work in manufacturing and engineering. It appears to be well designed and made. The lock mechanism works smoothly. It's fit and finish is top notch.Overall I'm very satisfied with it. I feel like my belongings are secure with this lock.