... set of main engine,a control box,a power cord,a set of jig(M5 M6(8) ... -tech CNC touch mode system and six-level speed control intellent operation system, it is easy to ... control is effected through laptop panel to set the speed, depth, positive &negative automatic control and digtal readout ... easy operation, light weight, high effciency, low work power, time and effort reduction, not easy to break screw ...