I have had key locks on my boat. I of course have got to the dock with the wrong set of keys and could not open the boat. So I have been getting new locks but never got around to it..... until I broke the key of in the lock. So I had to bring the grinder and cut through the lock. I was going to get the combo lock that has the numbers on the bottom so I can always set them to zero and be able to open the locks in the dark. I got to Lowe's and they have a new Speed Lock..... MMMMMMmmmmmm me like the word SPEED in a product. You just set the lock to the combinations of directions you move the button on the lock and it opens. Easy to set, and easy to to manipulate to get it open. You only need one hand to do it and never need to look at it to manipulate the lock. I will have to see how it holds up. It is a Master Lock Speed Dial.
