The use of a pump and hose is eliminated; for precise bolting, It now only necessitates energy provider for 220, 240v 50, 60hz, Compared to straight type, The angled is better aligned with limited working space, Accuracy ??5%, Double speed design, High/low speed can be shifted freely, Special design of one, Piece reaction arm, It s much better on strength and using life than casting and weld pieces, Adjustable by 360, Degree, Pistol handle of human engineering. Its cushion rubber can reduce 50% of the vibration. Free integration of the power handle and drive units, It can rotate oppositely industrial grade design for continuous using, It can meet the necessities of engineering installation, Production assembly and maitenance.