This Master 5403 key safe has a wide 106mm body with enough room inside for at least 5 large keys or access cards. The code is easy and quick to change, with 10,000 possible 4 digit code combinations. Dials are covered with a slide away shutter to offers protection from the weather. Easily mounted to most surfaces via the 4, pre-drilled, holes in the back of the key safe and the supplied screws (wall plugs not included). External size 146x106x53. Internal 115x77x40.