Heavy Duty 1/4-inch Angle Air Die Grinder Technical Details Angle-head design for easier use, more natural grip 20,000 RPM free-speed with only 4 CFM air consumption Lever throttle for feather-touch control Rear-air flow keeps exhaust away from your work 5-1/2-inch in length,0.9 lb working weight Air Die Grinders are one of the most useful and versatile tools in any workshop; this grinder is even more so because of it's angle-head design, making it easier to hold and to use. With a standard 1/4-inch collet, it accepts all of your favorite grinding stones and rotary files. 20,000 RPM free-speed with only 4 CFM air consumption, lever thottle for feather-touch control. Rear-air flow system keeps the exhaust away from from work. 5-1/2"-inch length, 0.9 lb working weight, 90PSI