Up to 5 times more precise than a standard drill bit Precise drilling is child's play thanks to the patented Centering Geometry technology. Hex shank for maximum power transmission on standard three-jaw chucks. Ideal for drilling in a variety of materials. Can be used in percussion mode on concrete and stone and in rotary mode on brick, tile, sheet metal, wood and plastic. Included: Set of 5 Expert MultiConstruction HEX-9 drill bits, 4/5/6/6/8 mm