I'm a realtor so when I saw these I had to try them. Most companies use electronic lock boxes now. He's the issue you drive an hour to show a home and all of a sudden your cell phone is acting up or the app didn't update like it should have. NOW you can't show the house. Most of the time agents like me have to have two on the house in the event one doesn't work. SO I always have an old fanshion lock box like this one! This one is heavy duty, and easy to change the combo. The shackle release is amazingly easy and it's large enough to put a couple different keys inside. People are not going to be breaking these off the door. They have nice weight and I actually went back and ordered more for the price. I can't say enough good things about how wonderful these keyboxes are! Old fashion combos are the way to go! They really never go out of style. So if your a realtor, or your selling your house FSBO. I recommend these. If your contractor, or have a vacation rental or just want a safe way to store a key somewhere these are a great tool to have!