This Extra Hard Screwdriver Bit is a good choice for universal use. All tasks are achievable thanks to the bit´s S2 Modified Steel and an optimised heat treatment process resulting in extra-hard quality enabling adequate performance in all tasks. The bit´s tapered torsion zone copes easily with torque peaks as it absorbs force and vibrations when screw-driving and thus fulfilling all tasks. This robust and compact set features a transparent storage box providing a good overview of its contents as well as safe storage and transport. It has a 1/4-inch external hex shank and is intended for universal screw-driving with screwdrivers and drill drivers. 12+1-piece Robust Line screwdriver bit set M Extra Hard version Bit length 25 mm ISO 1173 C6.3 with quick-change universal holder • Universal Use • The Extra Hard Screwdriver Bit is a good choice for universal use • S2 Modified Steel and an optimised heat treatment process results in extra-hard quality for adequate performance • The tapered torsion zone copes easily with torque peaks fulfilling all tasks Specifications: Set contents: (#227055 – 8678; PH1 (2x) PH2 (3x) PH3)(#227054 – 8682; PZ1 (2x) PZ2 (3x) PZ3 + QC UH) Length mm: 25