Designed for heavy-duty screwdriving applications and long-life drilling in metal. Highly efficient for installers, electricians, metalworkers, and woodworkers. Features a robust 1/4" Impact rated Hex shank for use in impact driver and drill driver. Ideal for driving screws into various materials and drilling in metal, such as when installing panels, equipment, and fixtures. The screwdriver bits are made from modified steel for strength and have laser markings for easy identification. Drill bits are made from HSS-G material for easy metal drilling. The set includes a torsion zone on screwdriver bits to absorb torque stress and prevent breakage. Bits have color-coded rings indicating head type. Metal drill bits are ground for durability and precision. The set comes in a Pick and Click case for organization. Scope of delivery: Bosch PRO Impact Screwdriving and Metal Drilling Mixed Set, 20 pcs.