4" Air Angle Grinder Cut Off Grinding Cutting Pneumatic Polisher Auto Body Mini Go to amazon.com Related posts 9 best pneumatic grinder wheel FeatureFree speed: 10000 RPMAir consumption: 5.0 CFMAir inlet: 1/4"Air pressure: 90 PSIFor using with grinding, sanding, and cutting wheels DescriptionFor using with grinding, sanding, and cutting wheels