Master LockMaster Lock 643D Set Your Own Combination Padlock, 1 Pack, Silver

I bought this product several years ago and it worked well. However, I lost the lock and order a new one about two weeks ago. The new one was a dud. I used a couple times successfully. However, the third time I used it the lock seized up and I was unable to open it. The timing was pretty bad because I just got out of the shower and had all my clothes and valuables in the locker. I had to head to the gym front desk in a towel and slippers. I was afraid I was going to have to walk home in a towel and slippers and hope that I could get into my house without keys and cellphone as the gym was getting close to closing. Luckily the gym staff was able eventually open it by using bolt cutters. Now I am on the market for another lock and afraid of getting caught "naked" by buying another dud lock. Wish these locks could be more reliable, not sure what product to buy, any recommendations would be appreciated.

Works great. Haven't had any problems. You can set your own code. It fits well with lockets and bike cables. Holds up well to being in the elements. Easy to open and close.

Man oh man I wish I had checked consumer reviews on Master Lock's own web site before purchasing this. The look *looks* nice—but, the shackle latches into place with only about 2-3mm of travel, and is held in place by a very shallow metal well—there's no "hook" that grabs a notch on the shackle, like pretty much any padlock in the world. To be honest, it looks like something that would be easily breakable by anyone with so much as a wrench.Additionally—and this is the WORST PART—it is *incredibly* easy to accidentally reset the combination while the lock is open. There are countless users who have been unable to open the lock because the combination was accidentally reset while it was in their bag, etc. Most other set-your-own-combo locks involve a little more effort to reset the combination; this one seemingly will do it almost spontaneously.If you Google this lock, you'll find that people are able to bust it open with paper clips quite easily.Honestly, this lock is so much less secure than even your run-of-mill high school locker lock. Save yourself the money and avoid this cheap lock. Get yourself a Master Lock 175D -- it's more expensive but everything about it makes it a better lock.

I don't understand why there's so many reviews of people Unable to open their locks. These locks require you to set your own combination. The only way they won't work properly is if you do not follow the directions. Please read the instructions inside the packaging to set your own combination correctly. I ordered 2 master locks. I followed the instructions exactly and have not had any issues. I opened and closed mine 20 times each upon receiving my locks and setting my combo. No issues at all because I read the instructions. I got these locks for my pelican tool box at work. These are not for security but for privacy. These just detur people from easily taking my tools. Could easily be broken off if you wanted to. But I think they're slightly better than the other cheaper options on Amazon. Good quality for price

This is not a heavy duty lock, it seems though it could be easily popped open prying with a screwdriver or such. That being said, I would be comfortable using it on a school or gym locker. I purchased one for my daughters use on her school locker.The combination is simple to set, and the lock is rather slim and unobtrusive. The numbers are easy to see, and the lock and tumblers all operate smoothly. When locked, it is solid and secure, with no rattles or movement in the mechanism.The only drawback with this lock is that there is a very small range between locked and unlocked, if you are not 100% sure it is closed, it is easy to think it is locked when it is actually still open. This is one drawback to the limited movement when locked, there is no 'over play' when closing the lock, where you push past the lock point. The lock only fastens when the bar is completely pressed into the body, 95% does not do it, only 100% down until it stops will actually lock it. Becuase of this, my daughter accidentally left hers unlocked at school. Thankfully noone stole anything from her locker, but they did steal the lock itself!I was comfortable puchasing a second of these locks for her use, the cost of the first was well worth the learning experience to teach her to always double check the locks!Overall, I comfortably recomend this lock for school or gym locker use (assuming you dont leave expensive electronics or jewelry in your gym locker). For the price, it is hard to beat.

Very quick shipping, love these locks since they’re so easy to use whether you’re at the gym or need to lock up a shed! Very secure, these are very easy to program and use!

You will like this lock if you need it for privacy. It should NOT be used to secure a firearm, gates or high value items.I bought this for the purpose of securing car keys from the people who live in my house. I have a steel lockable ammo container. So basically its to prevent someone from simply grabbing the keys and readily accessing the cars. It will slow someone down but it wont stop them if they are determined.Remember someone with a long set of clippers can get into any padlock. However for firearms, gates or high value items I would suggest something more substantial.This is strictly a light duty lock for securing privacy but wont offer security.