The AdirOffice Wall Mountable Medium Size Steel Multi-Purpose Suggestion Drop Box is constructed of heavy-gauge steel with a scratch resistant finish. Each box has a 0.25 in. slot wide enough for keys, ballots, mail, money or checks and a built-in storage compartment on the top can be used to store blank forms, ballots, etc. Equipped with pre-drilled holes and screws, the steel drop box can be mounted almost anywhere. The box measures 9.75 in. x 7 in. x 3 in. with 2 keys included with each box.