◆ simple operation (can pedal operation) without manual fixed workpiece ◆ automatic reversal device, free to adjust the stroke ◆ Special double-precision tapping safety clutch, effectively preventing the breakage of the tap ◆ High precision, vertical stabilizer, operate freely, can be made very small and ultra-fine thread a perfect tooth pattern and other general tappers can not be achieved. ◆ homemade button switch and special motors have been through rigorous testing, rugged ◆ has a timer function, can do for a long time High-speed continuous loop and one-way loop action ◆ automated operation, the unmanned aircraft and the best choice for beginners ◆ Tapping can be installed on-demand multi-axis, increase productivity