Sutton Tools Ultrabit Screwdriver Bit Square is a precision-made, heavy-duty screwdriver bit that has been designed to withstand high torque screwing and so lasts 12 times longer than standard bits. It features a shock absorber zone with an impact torsion neck and it has also been equipped with reinforced joints for a stronger link avoiding breakages. The Anti-breakage bit has a reinforced screw head ring for longer impact resistance along with a precise fit that avoids slipping and stripping screw heads. - Shock absorber zone with impact torsion neck, designed to withstand high torque screwing, lasting 12x longer than standard bits - Anti-breakage with reinforced joints for a stronger link avoiding breakages - Ring reinforcement has a reinforced screw head ring for longer impact resistance - Precise fit which avoids slipping and stripping screw heads - Power bit - 1/4 hex for use in power tools and quick change adapters