Cornwell Tools' Mini Right Angle Die Grinder, No. CAT301, features 20,000 rpm free speed. This die grinder offers 3 CFM average air consumption with 90 PSI air pressure, 1/4" NPT air inlet, 3/8" minimum hose size and 93 dBA sound level. The CAT301 is 1.1 lbs. net weight with an overall length of 5.5".