1/4" (6MM) AIR DIE GRINDER RP-7314 Lightweight aluminum body. Rear exhaust. It can be used with all types of accessories for porting, weld breaking, and smoothing sharp edges, as well as deburring, polishing, and grinding. Safety lever prevents accidental starts. Description Free Speed : 22, 000RPM Grinder Cap : 1/4" Air Intel : 1/4"NPT Sug Air Comp : 1.5HP Air Hose : 3/8"ID Avg Air consumption : 4.5cfm (128.3 l/min) Packing : 20Pcs