1. Square Drive: 1/ 4' ' 2. Capacity Bolt Size: 0.31' ' / M7mm 3. Free Speed: 240r. P. M 4. Max. Torque: 30ft-lb/ 41N. M 5. Overall Length: 6.5' ' / 165mm 6. Air Inlet: 1/ 4' ' 7. Air Hose: 3/ 8' ' 8. Air Consumption: 4cfm/ 114min 9. Net weight: 0.52kg 10. Recommend Air Pressure: 6.5kg/ cm2( 90psi) 11. Packing: 14pcs/ ctn. / 0.42'