The master lock 5400e key lock box can easily hold up to 3 keys house or car in a convenient location for regular use or can be portable lock in place over the door knob or handle for convenience set your own 4 digit tumbler combination for convenience and quick access the key storage door pivots open smoothly and remains attached to the lock body for convenient operation while the moulded body and vinyl coated shackle prevents scratching the 5400e has a reinforced body that will withstand hamme