The Bosch PRO 20 Piece Impact HSS Drill and Screwdriver Bit Set is a professional-grade mixed bit set designed for heavy-duty screwdriving and long-life drilling in metal, ideal for interior fitters and installers. The screwdriver bits are manufactured from heat-treated modified steel and feature an extended torsion zone that absorbs torque stress at the tip, helping to prevent breakage during demanding impact driver use. Colour-coded rings and laser markings make it straightforward to identify the correct bit quickly on site. The HSS-G metal twist drill bits are ground from solid high-speed steel, offering resistance to wear and consistent drilling progress through metal. All bits feature a 1/4" impact-rated hex shank, making them compatible with both impact drivers and drill drivers. The set is supplied in a Pick and Click case, keeping bits organised and easy to locate between tasks. With a comprehensive selection of PH, PZ, and Torx screwdriver bits alongside four twist drill sizes, it covers the most common requirements for interior installation work. Features and Benefits: • Extended torsion zone absorbs torque stress at the screwdriver bit tip to prevent breakage • Heat-treated modified steel construction for strength and high-torque resistance • HSS-G twist drill bits ground from solid steel for durability and fast drilling progress in metal • Colour-coded rings and laser markings for quick, easy bit identification • 1/4" impact-rated hex shank compatible with impact drivers and drill drivers • Pick and Click carry case keeps the set organised and accessible on site Specifications: Net Weight: 0.395 kg Contents: 25 mm Screwdriver Bits: PH2 (x2), PH3, PZ1, PZ2 (x2), T15, T20 (x2), T25 (x2), T30 55 mm Screwdriver Bits: PH2, T20, T25 60 mm Bit Holder: Standard Bit Holder Metal HSS-G Impact Twist Drill Bits: 3 mm, 4 mm, 5 mm, 6 mm