1. Square drive:1/2'' 2. Bolt capacity:5/8''(16mm) 3. Max.Torque:230ft-lb/312n-m Square drive:1/2''Bolt capacity:5/8''(16mm)No load speed:7000rpmMax.Torque:230ft-lb/312n-mHammer mechanism:Rocking dogAir inlet(npt):1/4''Air hose(I.D):3/8''Avg.Air consumption:6cfm/0.17m3/minSug.Air consumption:2HPNet weight:2.2KgCarton size:38x21x42cmPcs/ctn:10pcs. TH3302 Pneumatic Impact Wrench