Our high quality joint fasteners provide for a tight seal. The mortise or side-mounting options make Roto-locks perfect for attaching scenery flats and platforms, creating secure storage boxes, or locking ANYTHING you need to be locked and stay locked. Zinc plated with a steel cam, Roto-locks operate with the turn of a 5/16" hex key wrench , Bolts, washers and nuts not included. Allen key sold separately, but any 5/16" hex key wrench will work.