This socket screw offers different, randomly selected, privately exclusive socket geometry for every purchaser. The screw, named the Keyed-lok® screw, features a lock "keyway" forged into a screw head. Millions of variations are randomly available on each customer order, giving Keyed-lok users a private or exclusive fastener. Each keyway is licensed. Screw sizes range from #2 (2.5 mm)to 5/8-11 (14 mm) in Truss head and Flat head. Materials available are stainless steel and alloy steel.