1.Widely used in various modes, length, head types, tooth types of screw. 2 Power consumption is 60% ... paying special attention to the position of the screw head, just put the drill tip into the guide, then slide along, the screw will be pulled ... range:100V-240V .5, Widely used in various modes, length, head types, tooth types of screw. ModelsFk-514Fk-517Fk-520Fk-523Fk ...