Our Surface Mount Desk Locks are especially designed to mount on rear surface of drawer with cranked tongue to allow closure without machining. Item is square-backed. Barrel is 7/8" diameter x 7/8" long. Bolt throw is 3/8". Back of lock is 1-1/2" high x 1-1/8" wide x 7/32" thick. Keyed alike. These all metal die-cast locks are available in polished chrome or polished brass.