Square Drive: 12 mm x 5 / 160 RPM No-load Speed Maximum torque: 68 Nm/50 Ft-Lb Together with connectors of the USA, Italy, Nitto, and Europe types Front-end Exhaust Volume Bolt Size: 1/2"; Air Hose ID: 3/8"; 13mm Air Inlet NPT: 1/4" Packaging: 10 MB / 0 SB