So, just a quick review here to counter a couple bad reviews that I saw on this replacement lock set. I was hesitant to buy this based upon some reviews saying it wasn't right, or it didn't fit. But I did the smart thing and compared the pictures in the listing to what was installed on my safe. This IS the EXACT same stuff that originally came with my Stack-On safe. I mean really, EXACT; same fit, same look, same quality. I had ZERO issues installing this or programming it. It only took about 15 minutes to install and my safe now works like new again. If you bought this and it didn't work for you; then you either bought the wrong stuff or you should never touch tools and attempt mechanical things again in your life! Don't believe the naysayers; if you buy the right replacement set this will work perfectly for you. If you know how to use a screwdriver; this set will work perfectly for you. Glad I bought this set, and I'll buy another if I ever need one again. Perfect!