This wall mounted lock box comes with a secure metal lock and 2 keys. The entire unit is made from durable steel with a hinged door. The insertion slot is wide enough to accept a variety of envelopes and forms. This box is great for collecting comments and suggestions, rent or payments, as well as ballot or election entries. The pre-drilled holes in the back of the unit make it easy to install to the wall. Overall dimensions: 12.1"W x 17"H x 3.5"D. Insertion slot dimensions: 0.5"H x 4.5"L. Weight: 7 lbs.