Astro Pneumatic T20AH Die Grinder, Right Angled, Air Consumption: 3 cfm, Air Inlet Size: 1/4 Inch NPT, Air Pressure: 90 - 120 psi, Horse Power: 1/3 hp, Collet Size: 1/4 Inch, No Load Speed: 20000 Rpm, Hose Size: 3/8 Inch Inner Diameter, Sound Level dBa: Sound Power: 100.8, Sound Pressure: 89, Vibration Level: <2.5 m/sq. sec, 5 Inch Length, Weight: 13/16 lb