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The locks is very sturdy, the number wheels are easy to read and spin, and I love the easy combination setting procedure.
However, because of the way to you set the combination, you cannot just roll the numbers while the lock is open. Our use is on a chain on a gate. If you leave the gate and lock open for any reason the actual combination has to be left on the lock; you cannot spin the numbers. So, if our gate is left unlocked, anyone who knows this can just look at the numbers and know the combination.
I hope that makes sense. Another illustration is if you leave your gate open so someone can get in then you ask them to lock the gate on the way out, they see the combination and have to jumble the numbers for you when they leave.
I bought this lock for my work locker. I’ve had bad experiences with combo locks but it would be far too easy to lock my keys in my locker. Generally speaking the hospital I work at is safe enough that I’ve been able to leave my locker unlocked with no issues for over seven months. However the Joint Commission is coming as soon as Covid numbers are low enough and there’s a rule that all personal belongings must be secured so I bought this lock because it seems easy enough to use and I like the idea of being able to reset the combo. However what the instructions on the packaging failed to mention was that you have to open the lock before you try to insert the reset key...I spent quite awhile attempting the push hard enough on the lock to get the thing to turn so I could set the combo. At 0445 this morning I decided to see if there were any answers on Amazon and somewhere in the product info it has a picture of the lock being unlocked. Needless to say it worked beautifully and I’m no longer pissed off at combination locks in general.
This review is for the heavy-duty model. A key is not necessary to change the combination. I suspect that is why you cannot lock the lock without the combination. In other words, you cannot scramble the combination until it is locked. We have this on a chain for a gate, and now if we do not lock the lock after removing it, the combination is present on the tumbler. I.E. You could not open the lock, scramble the #s because it will not lock. For another person to lock it behind them, they need the combination. The combination will not scramble until you close the lock, and the lock will not close without the combination dialed in. Other than that, this model seems more sturdy than their less expensive model, which lasted us about 2-years outdoors.