Surface mounted for a primary or back-up locking system. Ideal on doors, gates and cabinets, they are appropriate for vertical, horizontal, left or right-hand applications. In vertical use notch in barrel holds bolt in locked position. Uses six #6 FH fasteners (not included). Chrome plated extruded brass. A 2-1/2" B 3/8" C 1/2" Fastener #6 FH