"INGERSOL-RAND" MINI ANGLE AIR DIE GRINDER Durable and long lasting All ball bearing constructionPrecision-machined steel gearsPositive grip 1/4" capacity collet chuck Self locking throttle leverFree speed: 18,000 rpmWeight: .97 lb. (.47 kg)Length: 5" (127 mm) Average air consumption: 3 cfm, @ load 12 cfm Sound (pressure/power): 98.4/111.4 dBA Rated power: .33 hp Collet size: 1/4" Air inlet: 1/4"