Kaba Simplex 7100 Series Metal Mechanical Pushbutton Auxiliary Lock with Thumbturn, 25mm Tubular Deadbolt, Flat Front Face Plate, 70mm Backset, Satin Chrome Finish

I have 3 of these. I love them. I ever have to worry about losing my keys or getting locked out. I don't even carry a door key anymore. I love the fact that they are purely mechanical. No batteries to go dead. There are only 5 buttons but since your combination can use multiple button presses at the same time there are many possible combinations. I do have to mention that the installation can be a bit tricky especially if you are I stalling on a door that has already been drilled for a traditional deadbolt.

great lock, works perfect.

No battery, no electronics. Been using these for about 25 years. Still have the original.Only issue is the deadbolt distance into the door is a little longer than standard. (69.63mm / just short of 2-3/4") OK if you are cutting a new hole, not good for a replacement.

It does not fit the hole if you are using the hole from a deadbolt the hole in the door has to be moved over and use a cover plate

This is my third one, so I know what I bouth and they are perfect!!!

We tried for weeks to get this to work properly. the lock turn was sooo tight most people could not turn it! and the entire thing would lock so that code could not be cleared.. AND NOW I CAN'T RETURN THIS PIECE OF JUNK! UNFAIR

I love this lock. No batteries EVER! A little tricky to install, but not much different from other locks I imagine. Can also program your own code.

Great lock