Chicago Pneumatic 874 3" Air Cut-Off Tool 22,000 RPM. Lock off throttle to prevent accidental start up. Rear exhaust directs air away from workpiece. Built-in regulator matches speed to job. Applications: cutting through sheet metal, fiberglass, bolts, muffler clamps and hangers; also grinds down burrs and rough edges. Specifications: Wheel Size in.: 2-7/8, Length in.: 7-1/4, Average Air Consumption CFM: 5, Air Inlet NPTF in.: 1/4, Free Speed rpm: 22000.