Features: One-handed operation, small and convenient, easy to use and operate. Copper wire motor is powerful, high temperature resistant and safer. The shape of quick clip chuck is aligned and it is quick and easy to replace the sleeve. Clockwise and counterclockwise rotation, low noise, has a long service life. Positive and negative dial, disassembly and installation one-touching switching, easy to screw up the screw. Double switch makes operation safer. The body comes with an LED light for operation in dark environments. Opposite vents, strong heat dissipation, no burning machine. Soft rubber wrapped handle feels comfortable.