Highly robust bits for heavy duty applications, even withstanding the high power of impact drivers. Sturdy, extended torsion zone for long-lasting work. S2 modified steel, and an optimised heat-treatment process, provide extra-tough endurance for high performance, including in plant installations or heavy industrial work. 1/4" external hex shank for use with drill drivers, screwdrivers, and especially with impact drivers. Hex shank for maximum power transfer in standard three-jaw drills and hexagonal drill driver chucks. Part of the BoschPick and Clicksystem, which enables fully customisable bit collections and the easy replacement of old packs. Supplied in a plastic holder that can be easily clicked into thePick and ClickEmpty Cases L and M. High-Speed Steel Blades Suitable for Power Screwdrivers & Hand Tool Bit Holders Highly Robust Bits High-Speed Steel Blades Suitable for Power Screwdrivers & Hand Tool Bit Holders Highly Robust Bits