Air Die Grinder RP7318 54,000Rpm Micro Grinder Model No.:RP7318 Free Speed: 54000RPMAir Inlet:1/4''NPTAir Hose:3/8''IDAvg.Air consumption: 2CFM (57 l/min)Sug. Air Comp.: 1HP Feature:1) Slim and comfortable design for greater accessibility.2) Convenient hose with hose protector.3) Nipple and wrenches included.4) Ideal for final cleaning and polishing of dies, Jewelry and hobby use.