... . Power output power of a strong, DC2 ~ 15V/18V adjustable in a row, stepless speed regulation ... create sophisticated, convenient Clamping Tool 'Shan Jie, a very powerful Clamping force, especially suitable for ... to achieve speed. Positive inversion control. Equipped with over-voltage, over-current. Overload protection device. ... ,000rpm max. Nail drill machine with twist lock handpiece and drill bits