The master lock 5415e wall mounted reinforced key lock box has a solid zinc body with dual locking levers has a 4 digit resettable combination provides storage for keys credit cards and more weather resistant and has a strong resistance to hammering and sawing attacks can be used both inside and outside the home office worksite or anywhere that restricted or safe access is required masterlock have now taken this to the next level with the 5415e in which you can safely leave keys for children to