Features: Easy to operate Once hold will finish cutting edge and crossing edge Can grind twist drill with two flutes Grinding range: cutting edge and crossing edge Grinding diameter: 2 13mm (equipped collet: ER20) Grinding angle: 118° 135° Motor: AC 110V, 1 phase or AC 220V, 1 phase Wheel: for the diamond grinding wheel, you can operate without coolant and repair We also have the type ZZM-C26 drill sharpener for grinding drills of 13 - 26mm diameters