... grinding,edgbreaking,deburring.Specification:1) 4" air angle grinder (lever type) 2) Free speed: 11,000rpm3)Air inlet: 1/4" BSP OR NPT4 ... ): 3/8"5)Average air consumption: 6 cfm6)Working pressure: 90 PSI (6.5 kg/cm2 )7)Overall length:230mm8)Net weight ... : 2.2 kgs9)Front exhaust. 4" Air Grinder