The Bosch Extra Hard Screwdriver Bits deliver professional-grade performance through S2 modified steel construction and an optimised heat treatment process. This engineering approach produces extra-hard quality bits designed for demanding screwdriving applications. The tapered torsion zone absorbs torque peaks, force and vibrations during operation, ensuring consistent performance across varied fastening tasks. The 1/4" external hex shank provides maximum power transfer compatibility with standard three-jaw drills and hexagonal drill driver chucks. Supplied in a convenient Tic Tac box containing 25 pieces, this PZ2 x 25mm bit set offers comprehensive solutions for universal screwdriving with both manual screwdrivers and power drill drivers. Features & Benefits: S2 modified steel with optimised heat treatment for extra-hard durability. Tapered torsion zone absorbs torque peaks, force and vibrations during screwdriving. 1/4" external hex shank ensures maximum power transfer in standard three-jaw drills and hexagonal drill driver chucks. Ideal for universal screwdriving applications with screwdrivers and drill drivers. Convenient Tic Tac box packaging for organised storage and transport. Size: PZ2 x 25mm. Includes: 25 pieces.