Dynabrade 92801 5-Inch Diameter by 3-1/2-Inch Wide Standard Dynacushion Pneumatic Wheel, Black Inflatable rubber wheels conform to work surface contours Dynabrade pneumatic wheels are inflatable rubber wheels designed to run on various Dynabrade tools Speed of tool must not exceed maximum operating speed of accessory When fitted with an abrasive belt and inflated to the desired firmness, our pneumatic wheels are ideal for countless grinding and finishing applications Dynabrade pneumatic wheels support coated abrasive and non-woven nylon belts for use on metal, wood, plastic, ceramic, fiberglass and composites 98130 Air Chuck included with each DynaWheel and Dynacushion Pneumatic Wheel