Not all key safes are equal... This one tops the class.
Installing a high quality key safe / lock box like this one we installed at Darling Point, will allow you to provide access to tradespeople or visitors to your building when you're not able to be home. You can also store your keys inside as a backup in case you get locked out with the assurance that they are secure inside.
Changing the code is easy, with the ability to change the code as many times as you like.