Bosch Hex-9 versatile drill bits with sharp centring tip and advanced geometry offer precise results. Features high-performance carbide tip manufactured through fine grinding. Can be used in impact mode on concrete and stone, and in rotary setting for brick, tile, sheet metal, wood and plastic. Includes an optimised dust extraction channel for efficient drilling, and a hex shank for maximum power transfer in standard 3-jaw drills and hexagonal drill driver chucks. 7 piece set. Steel Hex Shank 5mm-10mm Dia. Drill Bits Suitable for Concrete, Soft Tiles, Steel, Softwood & Plastics Carbide Tip Can be Used with Rotary & Impact Modes Dust Extraction Channel Steel Hex Shank 5mm-10mm Dia. Drill Bits Suitable for Concrete, Soft Tiles, Steel, Softwood & Plastics Carbide Tip Can be Used with Rotary & Impact Modes Dust Extraction Channel