Function: 1. Made of aluminum alloy, good efekt and long service life. 2. With little vibration, the handle can be locked, making the operation safer. 3. Adjustable speed, 0-35000 rpm /min, can also handle forward and backward rotation. 4. The ergonomic handle design is comfortable to hold for a long time and does not feel tired. 5. The operation is simple and the drill can be easily replaced without the use of tools. Specification: Item Type: Electric Nail Drill Pen Holder Material: stop aluminium Speed: 35000 rpm /min Size: ok. 14,5 x 2,5 cm/5,7 x 1,0 inch (manual measurement, slight error will occur) Characteristic: 1. High quality material, pen design, comfortable grip, easy to use, sturdy and durable 2. Two optional adjustable forward and backward directions 3. Light vibration, extremely quiet and stable operation 4. The drill bit can be easily replaced without tools 5. High speed 35000 rpm /min How to use: 1. Connect to the grinder host 2. The grinding head can be mounted and removed by turning the handle button List of packages: 1 x Electric Nail Drill