Model:VIV-5001 Free Speed:18000rpm Power:1hp Collet Size:3/8'' Spindle Size:3/8''x24 Air grinder rotates or move the grinder mainly through the air motor, thus reaching the purpose of deburring, descaling, coping welded joint, lapping mould, architectural decoration and so on. ModelFree SpeedCollte SizePowerAir Inlet NameVIV-500118000rpm1/4''1hp1/4''ptLong Grinder Long Grinder