All the power at half the noise! The superior mechanics and internal mechanisms of the AIRCATĀ® impact ratchet includes high-quality bearing surfaces, air chambers and turbines. The patented exhaust muffler/filter technology reduces the level of noise while retaining more power and torque. The Aircat pneumatic corner die grinder is designed to cut bolts, trim welds, cut exhaust pipes and more. Compact for use in restricted spaces. Key Product Specs Disc Diameter (in.) 4 Air Consumption (CFM) 7.8 Speed (RPM) 15,000 Air Inlet Size (in. NPT) 1/4 Additional Product Specs * 90 PSI * Through-the-handle exhaust