Strip resistant screw head and screwdriver tip in combination

摘要: A screw head and screwdriver for use in combination are provided to reduce the occurrence of stripping a during tightening or removing screw. The slot employs walls that indent some portion wall, forming ledge under which tip may be retentively captured thereby preventing from lifting head. driver also generally employ tapered form, such widens central out outer circumferential edges. narrow matching form tends not slide off use. Utilizing these inventive design concepts prevents slipping resulting need apply less downward pressure.