Square Drive: 12.7mm(1/2″) No-load speed:160RPM Max.torque:68N.m(50Ft-Lb) With Europe type connector, USA type connector, Nitto type connector and Italy type connector. Front Exhaust Capacity Bolt Size:1/2″(13mm) Air Inlet (NPT) : 1/4″ Air Hose(ID): 3/8″ Packed by color box