Features: All-in-one design, forward and reverse rotation, disassembleand installation, multi-purpose. Two gears of speeds adjustable, stepless speed adjustment and 18 gears of torque forces adjustable, easy to adjust the speed and torque according to your demands. Adopts brush motor, quick-start, timely braking, smoothly speed regulation in a wide range, relatively simple control the circuit and so on. Ergonomic soft rubberized anti-slip handle design, easy to grip and with comfortable hand feeling, energy saving and labor-saving. Reserved several ventilation cooling holes, efficient heat dissipation, will not hot for working long time. Hammer and anvil impact mechanism are manufactured suing the high carbon hardness steel and quenching heat hardening process for maximum fastening and driving power. Suitable for construction site shelves, maintenance, woodworking, etc..