1/2 inch Air impact wrench set Specification Square drive 1/2″ (twin hammer) Air pressure 6-8kg/cm2 No-load speed7500r.p.m Capacity bolt dia.18mm Max.Torque550N.M Vibration of square head <0.4mm Net weight2.7kg Air inlet 1/4"Set accessories:1PC Mini Oiler 1PC Air Nipple1pc 4mm hex key wrenchSocket size:12,13,14,17,19,22,24,27mm 1/2 inch Air impact wrench set