This tool has a hardened alloy steel barrel with a standard .401 shank size. This tool accepts all standard .401 shank tool bits. It has an independent power regulator and teasing trigger for operator control. It is ideal for muffler and pipe removal, body shop work, scraping rust and light front-end work. Product Features:Aluminum HousingBlows per Minute (bpm): 3500Stroke length: 2-5/8Bore Size 3/4 Air Pressure: 90 PSIHose Size: 3/8 Air Inlet: 1/4 NPTAverage Air Consumption: 4 cfmMin. Recommended Compressor: 4 hpMin Recommended Tank Size: 20 Gallons