Ideal for use with any standard bench grinder, the grinding attachment provides quick and precise sharpening of Ø3-19mm (1/8-3/4") HSS twist drill bits with a 75mm minimum length. Features an angle gauge with presets at 41° (Countersink), 49°, 59°, 68° and 88°. Also features a rotating neck which aids grinding both sides of the drill bit. Perfect for use in any workshop or garage.