Chicago Pneumatic 6151952106 Air Die Grinder - Angle Grinder with Accessible Speed Regulator. Pneumatic Die Grinders Lightweight Die Grinder: Hand tool is professionally designed for general maintenance applications. The rotary grinder is made to be lightweight for easy maneuverability. Air die grinder includes 1/4-in. and 6 mm collets. Powerful Motor: Powerful angle die grinder is equipped with 0.32 HP motor and can work with a maximum speed of 22,000 RPM. Professional Die Grinder features a built-in speed regulator for better control. Safe Tool: The air tool features a lock-off throttle to prevent accidental start-ups. Power grinder is not excessively noisy when in use and works with an average air consumption of 4.1 CFM. Comfortable Grip: The insulated handle grip of the air grinder provides a strong hold with maximum user comfort. The lightweight grinding tool allows long hours of usage without hand fatigue. Designed for Tight Spaces: Die grinder is built with a rear exhaust that helps in keeping air away from work surface. The Pneumatic grinder is a suitable tool for limited space applications.