Product Description NLB-300 Rail Impact Wrench with One Socket NLB-300 railway construction rail fastener wrench is used for tightening and loosening sleeper bolts, hook-bolt nuts, etc. High power petrol engine ensure large torque and high working efficiency. Specification Model NLB-300 Type Rail Impact Wrench Material Stainless Steel Dimensions (L x W x H) (mm) 1300*510*760mm Main shaft rpm 780r/min Max. loosen torque 300 Nm Max. fasten torque 150 Nm Working efficiency 10 pieces/min Petrol engine 1) Model: GX160 (2) Rated power: 4Kw (3) RPM: 3600r/min Weight 60kg