DENX Brand Wireless Screw and Nut Driver Drill Works with a 21-volt lithium battery. Versatile: It works as a regular drill for drilling and also works as a screwdriver and a high-impact drill for hard surfaces. Speed: Rotation speed reaches 2300 RPM. Control: Equipped with 18 torque settings to adjust the appropriate force. Contents: Usually comes with two batteries, a charger, and a set of screwdriver bits and drill bits.