The CP873 Low Speed Air Tire Buffer with Slip Chuck is perfect for every tire shop doing patchwork, roughing areas for recapping, and cleaning tire moldings. Chuck Size: 7/16-Inch, Avg. Air Consumption: 4 CFM, Air Inlet NPTF: 1/4-Inch, Min. Hose Size: 3/8-Inch, Sound Dba: 98 , Power Vibration: 2.5, Free Speed: 2500 RPM. Lock off throttle to prevent accidental start up. Rear exhaust directs air away from work piece. Built-in regulator matches speed to job.