AIR DIE GRINDER REAR EXHAUST - MSI PRO Heavy Duty Lightweight Steel Body - Variable Speed 0.6HP 22,000RPM - 6.75" L - 1/4" Die Case HEAVY DUTY Lightweight Steel Construction. Grooved, Comfort Grip body perfect for high speed grinding and polishing. Durable BALL-BEARING construction reduces vibration, improves balance and ensures a longer life. VARIABLE SPEED throttle and built-in adjustable air regulator. REAR EXHAUST NPT: 1/4"  Air Hose: 3/8"  PSI: 90  CFM: 4