The General Purpose Floor Lock is a heavy duty floor-mounted door lock made by Master Lock. It is constructed of zinc with a black powder coat finish and stainless steel locking bar. This floor lock features a 5/8 inch diameter locking bar that secures doors up to 48 inches wide. It has a flat key cylinder lock with two keys included. The lock mounts to the floor with four 3/8 inch diameter zinc plated lag screws, allowing it to be used on wood or concrete floors. This versatile floor lock can be used in commercial, industrial, or residential settings to provide an extra measure of security.