Canadian Tool and Supply 5-Inch Pneumatic Wet Polisher Air Sander with 5/8-11nc Arbor Spindle (PWPS-5) Comfort Grip insulates hands from cold and vibrations 5/8" - 11nc Arbor fits many accessories also comes with 5" (125mm) velcro backing pad Free Speed (RPM): 6,000 ~~ Working Air Pressure: 90 PSI two wrenches (for removing disc) 1/4" 'M' Style air quick connector (milton style)