3 piece SabreCut Impact Rated Magnetic Bit Holders. Please NOTE that the magnet only holds the Impact Bit and NOT the Screw.. SabreCut Extreme professional quality Bit Holders specially designed for use with impact drivers. Forged tip for greater impact resistance and a longer lifetime. Impact torsion screwdriver bits. Tough heat-treated bits for improved durability and torsion zone for reduced breakage. Ideal for continuous high torque use withstanding changes of load due to elasticity.. Professional quality Impact Driver Bit Holders.