Up to 5 times more precise than a standard drill bit Drilling accurately is a breeze with patented Centering Geometry technology. Hexagonal shank for maximum power transfer on standard three-jaw chucks. Ideal for drilling holes in a variety of materials. Can be used in hammer mode on concrete and stone, and in rotary mode for brick, tile, sheet metal, wood, and plastic. Scope of delivery: 5-piece Expert MultiConstruction HEX-9 drill bit set, 4/5/6/6/8 mm