The Bosch 20 Piece Drill and Drive Bit Set is a versatile screwdriver bit set designed for drilling and driving applications across a wide range of everyday tasks. Each screwdriver bit in the set is manufactured from S2 Modified Steel with an optimised heat treatment process, delivering extra-hard quality that holds up under demanding use. The tapered torsion zone is engineered to absorb torque peaks, force, and vibration during screw-driving, helping to protect both the bit and the fastener. The 1/4-inch external hex shank ensures a strong, secure connection with maximum torque transmission, making the set compatible with standard three-jaw chucks and 1/4" internal hex tool holders. This makes it suitable for use with the majority of cordless drills and screwdrivers commonly used on site. The set covers a broad range of drive types — including Phillips, Pozidriv, slotted, hex, and Torx — alongside HSS twist drill bits in multiple sizes. Additional accessories including a tool holder, sleeve with countersink, shank, and wrench make this a practical all-in-one solution for contractors, joiners, and general tradespeople. Features and Benefits: • S2 Modified Steel construction with optimised heat treatment for extra-hard durability • Tapered torsion zone absorbs torque peaks and vibration during screw-driving • 1/4" hex shank compatible with three-jaw chucks and 1/4" internal hex tool holders • Broad selection of drive types and HSS drill bits for versatile, universal use • Includes tool holder, sleeve with countersink, shank, and wrench Specifications: Bit lengths: 25mm (PH2 x2, PZ2, SL5, HEX4, HEX5), 85mm (T15), 27mm (T20), 39mm (T25), 107mm HSS drill bit diameters: 2.0mm, 2.5mm, 3.0mm, 3.5mm Net weight: 0.249kg Contents: PH2 (x2), PZ2, SL5, HEX4, HEX5, T15, T20, T25, HSS twist drill bits (2.0mm, 2.5mm, 3.0mm, 3.5mm), tool holder, sleeve with countersink, shank, wrench