From the Manufacturer
The Chicago Pneumatic Mini Air Die Grinder is absolute best for prime-speed blending, smoothing, porting and deburring in confined areas. The built-in regulator matches the velocity to the job. This grinder produces 28,000 RPM of free speed. The lock off throttle to stop accidental get started up and a rear exhaust directs air away from the work piece. This compact grinder is 4-3/4 inches long and weighs best 3/4 pounds. It comes complete with 1/4-inch and six-millimeter collets.
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Ideal for moldings and general top-speed polishing and grinding
Powerful aluminum alloy body
Chicago Pneumatic streamline safety lever
Built-in air regulator
Features 1/4″ and 6 mm collets