Up to 50x more robust than a Bosch 2607001528 Extra Hard Bit Need Phillips screwdriver bits for your next screwdriving job? Bits that last long and perform well in heavy-duty applications? Try PRO Impact PH. We designed them for strength and resistence to high torque. PRO Impact PH Screwdriver Bits are a great choice for installers looking for robust, heavy-duty screwdriver bits. The bits are made from heat-treated modified steel for outstanding strength and resistance to high torque. Their torsion zone absorbs the torque stress at the bits’ tip to make sure they won’t break. They have colour-coded rings indicating the head type and laser markings to help you pick out the size you need. 1/4" Impact rated Hex shank for use in impact driver and drill driver Tested in Bosch labs according to Bosch standard procedures. Features and Benefits: • Up to 50x more robust than a Bosch 2607001528 Extra Hard Bit • 1/4" Impact rated Hex shank for use in impact driver and drill driver • For driving PH screws efficiently, eg when installing all types of panels, equipment, and fixtures • Highly efficient for installers, electricians, metalworkers, and woodworkers: Robust Specifications: Dimensions: PH1; PH2; PH3 Length mm: 55; 55; 55