Four-dimensional heat dissipationSpiral heat dissipation system, fast heat dissipation to prevent burning machine Relief pressure valve switchTighten when working, loosen when pressure relief, easy to operate High strength Clamps, compression joint tightFully meet international compression joint needs, accurate positioning, Clamps can rotate 360° Brushless spark free high speed high torque low loss long life Power display at any time control 18V 4.0A battery life longer, Manufacturer: MMHHHG