1,Easy to use dialing speed control, 2,Forward and reverse operation swith, 3,Up to 25000RPM, 4, Extremely quiet and smooth · The zs-301 electric nail drill is factory manufactured, high quality with low price, fast speed, work quietly.· The handset adopts the card buckles tight structure, safety, conveniently disassembles.· Transmission system adopts the structure of dual absorption of shock, ...