Features and Benefits: Aluminum body Automatic throttle release Dead handle and spindle wrench included Ball bearing construction for long lifeSpecifications: Pad size: 7" Spindle thread size: 5/8"-11 Free speed: 2,500 RPM Air inlet thread: 1/4" NPT Air hose I.D. size: 3/8" Net weight: 6-1/2 lbs. Overall length: 16" Avg. air consumption: 12 cfm Noise level: 85 dBA @ 90 PSI