This Bosch Professional Impact Set is designed for strength and resistance to high torque, making it ideal for heavy-duty applications. The bits are crafted from heat-treated modified steel for superior durability and resilience under high torque. Their specialized torsion zone effectively absorbs torque stress at the bit tip, preventing breakage. Each bit features a color-coded ring for easy head type identification and laser markings for quick size selection. The set includes 1/4" Impact rated Hex shank compatible with impact drivers and drill drivers, ensuring efficient screw driving for tasks like installing panels, equipment, and fixtures. It's a highly efficient choice for installers, electricians, metalworkers, and woodworkers. The set is tested in Bosch labs according to Bosch standard procedures. Specifications include PH2, PZ2, T20, T25, and T30 bit types, each with a length of 25mm, totaling 25 pieces.