US PRO Heavy Duty 1''dr air impact wrench Gun 2200Nm B8531

Square drive? 1"
Free speed: 3900r.p.m
Bolt capacity: 38mm
Max.torque: 2200N.m(1600ft-lb)
Hammer mechanism: single hammer
Air inlet: 1/2"
Air pressure: 8-10kg/cm2
Air length 9"/3"