Bosch Professional Robust Line Screwdriver Bit Set S - Extra Hard Version 25mm (8+1 Piece)

The Bosch 9 Piece S Extra Hard Screwdriver Bit Set is a Phillips head bit set designed for universal screw-driving with screwdrivers and drill drivers across a wide range of everyday fastening tasks. Each bit is manufactured from S2 Modified Steel and undergoes an optimised heat treatment process to achieve extra-hard quality. This makes the set a reliable choice for tradespeople and contractors who need consistent performance across varied materials and fixings. The tapered torsion zone is a key design feature, absorbing force and vibrations during screw-driving to cope with torque peaks without compromising the bit. The ¼-inch external hex shank ensures a secure connection with strong torque transmission in both three-jaw chucks and ¼" internal hex tool holders. Features and Benefits: • S2 Modified Steel with optimised heat treatment for extra-hard durability • Tapered torsion zone absorbs force and vibrations to handle torque peaks • ¼" external hex shank for maximum torque transmis