The tightening direction of electric drill fixture is clockwise or tightening, and counterclockwise is loosening. According to relevant data, install the drill bit: after inserting the batch head and drill bit, etc. In the chuck of the switchless drilling rig, hold the ring tightly and turn the sleeve back (clockwise as viewed from below). If the sleeve becomes loose during operation, please tighten the sleeve again. When tightening the sleeve, the tightening force will be stronger and stronger.