Master Lock 40D Stainless Steel Discus Padlock with Key

I purchased these a year and a half ago for my enclosed trailer doors and I'm thoroughly impressed with its performance. They are perfect for securing multiple areas, and the shrouded design adds an extra layer of protection against bolt cutters.The stainless steel construction ensures durability and resistance to corrosion, making it ideal for both indoor and outdoor use. The locks feel robust and well-made, providing a sense of security that’s hard to beat. The body is substantial, and the locking mechanism operates smoothly without any hitches.One of the standout features is fact that it retains the key when unlocked which ensures that it cannot be left unlocked. This is a great safety feature, especially for high-security needs. Overall, these locks offer excellent value for money, combining strength, reliability, and convenience. I highly recommend them for anyone in need of a reliable locking solution.

This is a great lock. Very difficult to cut and very secure.

Works great

Perfect for securing your trailer doors. Operates smooth and easy. Not my first set. use them on all my equipment trailers.

I understand these are made in china which is a disappointment, but that is the way of the good ol USA as of late I reckon. That said, I think they will serve the purpose. Bought them to lock up my large enclosed trailer which has two bar latches on the rear ramp door, and a bar latch on the side door. 3 locking positions, 3 locks. Works out nicely. I didn't experience the issue I read having to jiggle the keys to get them to work. All three of mine seem to open smoothly as I would expect. They seem well built and sturdy even being built in some Asian sweat shop I'm sure, so for $10 a piece I am fairly satisfied. My biggest complaint is't specific to these locks, or Master Lock for that matter. As for most things we need or use today seem to not be made in the USA, even long seasoned USA companies. No wonder it's so difficult to find a good job these days.UPDATE: I still like these locks, but have one complaint. I live in Michigan with freezing temps. I discovered that unless I want to deal with frozen locks on my trailer, that I have to be sure to continually remove the lock and dump water out of it to keep it from freezing inside the lock. This lock does have a couple drain holes, but on my trailer, the latches places the lock sideways, not upright. Water gets in the lock and does not drain in this position. Master needs to have drain holes on all sides so it will drain water in any position. If I don't dump the water out before it freezes, the lock will freeze solid and you won't be able to open it until you thaw it out and dump the water.

I use this exact lock on the gate across my driveway. I am on my second lock in 16+ years. The first one became difficult to open, so I replaced it with one of these locks that I bought locally. The lock I am using now still works fine, but it is starting to rust. I can't find these locally anymore. All they have are the part plastic ones. I can't use plastic because sometimes they get water in them from snow or rain and I have to deice them with a blow torch. A good way to prevent that is to put a plastic freezer bag over it with a rubber band, but sometimes I forget. Anyway, I never inspected my old lock very closely. As far as I can tell, these locks are just as sturdy and well made as the one I have. I bought two locks in two separate packages. The keys fit well and the locks open and close properly and easily. They also have two separate keys and are not interchangeable. I did that on purpose just to see what I would get because other reviews say they are all keyed alike. Mine are not.

Very nice , heavy construction . Work as they should

Good quality lock