Adjustable power regulator for precise control Lock off throttle to prevent accidental start up Excellent for tire scuffing, cleaning tire moldings and general high speed polishing and grinding 1/4 collet/spindle size 22,000 rpm free speed 1.25 lbs 6.5cfm average air consumption 26cfm actual air consumption @ load 1/4' NPTF air inlet thread size 3/8' min hose size