Professional Quality with a 1 Year Warranty. Features a durable, lightweight aluminum casing and a 180-degree stainless steel guard. Includes a safety trigger. Specifications: Free speed: 20,000 RPM Capacity: 3" (76.2mm) Air Inlet: 1/4" NPT or BSP Average Air Consumption: 5.5 CFM Working pressure: 90 Psi (6.2 Bar) Length: 190mm