Snap-On CT8850 18V 1/2" Cordless Impact Wrench - Tool Only Model: CT8850 Torque Output: Delivers approximately 600 ft.-lbs. of torque. Speed: Operates at 0–1900 RPM. Features: Includes a variable speed smart switch, thermal protection sensor, and an LED work light. Power: Typically uses an 18V lithium-ion battery.