Up to 50x more robust than a Bosch 2607001528 Extra Hard Bit Looking for a compact and reliable screwdriver bit set you can use for tough applications? Try the PRO Impact Set. It includes bits you need for most screwdriving applications. The PRO Impact Set is a great choice for installers who need 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 ensure they won’t break. They have colour-coded rings indicating the head type and laser markings helping you pick out the size you need. They are housed in a sturdy case and arranged in holders you can use to build your own toolbox. 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 screws efficiently, eg when installing all types of panels, equipment, and fixtures • Highly efficient for installers, electricians, metalworkers, and woodworkers: Robust