Master Lock 875D Heavy Duty Outdoor Combination Lock 2, Brass Finish

This is a high quality lock that I used on shipping containers. It was nice to have several with the same combination. They may seem expensive but you get what you pay for. I don’t mind paying up for a quality product like this.

very easy to play with, can open in 2 minutes without knowing the combination

Why did you pick this product vs others?:This is a great lock for the price.

The first 5 months we had this lock it was securing a dinghy in salt water, getting repeatedly dunked. Whenever we used the dink, I'd blow the water out of the lock and spray in some WD-40. It worked fine. Then we used it to lock the ladder up to our boat which was stored outside. Constantly in the weather. Every month or two I'd spray the lock again. It's still working fine. As can be seen in the photos, there is some corrosion. The type of corrosion makes me think the body is die-cast which can be a more brittle metal. It will probably rot out faster than a brass or stainless lock would. But I expect to get at least another 3-4 years out of it. Overall, quite pleased for the price. Just be aware that outside it needs some help in the form of rust inhibiting lube.

I've had this for 2.5 years outside on my boat (freshwater) and while it has seriously rusted, it still works and the numbers rotate smoothly and it locks and unlocks as it should. It does not offer the absolute highest level of security - it is made largely of zinc so you could melt it, or try the combinations - but "locks keep honest people honest" as they say; if you need serious security then don't buy a $18 lock. Good value for the price.

Once you compare this model to the less expensive version, you can see that this one is better built and smoother in operation. My older on stopped working due to exposure to the weather and basically you could open it without the combination, which is not good. Hopefully this more expensive model will stand up to time. Make sure to test it frequently to make sure it is locking as it should.

This lock is an absolute joke. The quality overall feels cheap and pretty poor, especially compared to some of Master Lock's options (even cheaper ones)I was hoping this would be an upgrade from their 175D, however it is significantly less secure.I was able to decode the wheel within 2 minutes after randomly setting a new combo. The combo can be figured out by adding pressure to the shackle and then feeling for the play in each dial. At times the dial would spin and only stop once it reached the correct number. This is functionally flawed design, it is not secure as it can easily be bypassed without a tool and just a minute or two of time. I am returning this useless lock and going with another 175D as they have improved the tolerances and you need to have a tool to bypass the lock. This doesn't even require a tool, I am disgusted and disappointed in this atrocious design.Do not buy this lock! I found a video after looking up if my lock was just unlucky and had poor tolerances, the lock picking lawyer has a great video that will turn you off from this lock.This lock is only good for a little trick to show your friends how you can open a lock with a random combo.

Easy to set and keeps on working