Lockout Stations and Storage 147 These Master Lock key boxes are designed to fit over door knobs, they can easily be removed and reinstalled. The box allows you to set your own combination for optimal security. ] ] Internal Dimensions: H: 89mm x W: 70mm x D: 25mm Model Product Name ML-5400D Select Access Key Box Key Lock Boxes These Master Lock key boxes are designed to be permanently installed on a wall. It can be placed both indoors or outdoors. Protective weather-proof cover prevents freezing and jamming. The box allows you to set your own combination for optimal security. ] ] Internal Dimensions: H: 83mm x W: 57mm x D: 25mm Model Product Name ML-5401D Select Access Key Box Wall Mount Key Lock Boxes The wall mount design offers permanent installation. Set your own 4 character combination for keyless convenience and increased security. The protective weather-proof cover prevents freezing and jamming ] ] Internal Dimensions: H: 89mm x W: 57mm x D: 25mm Model Product Name ML-5423D Push Button Key Box Push Button Wall Mount Key Lock Boxes