Head 타입 = Hexagon 타입 = Driver Bit Set Size = Hex 3 Material = Chrome Molybdenum Steel Power Tool Hexagon Drive Bit. inch, hexagonal drive bits manufactured to DIN3126-E6-3 standard.,Particularly suited for high torque screwdriving, i.e. driving machine screws to a dead stop. For use with hexagon socket screws Tip meets the requirements of DIN911