NLB-1800 Rail Bolt Wrench The NLB-1800 Rail bolt wrench is novel in design, compact in structure, small in volume, light in weight, strong in maneuverability, two-stage shock absorption of handle, portable in hand, convenient in getting on and off the track, especially suitable for the regional maintenance operation of track bed where turnout, tunnel, bridge and culvert and other large and medium-sized railway maintenance machinery cannot work. Specification Model NLB-1800 Type Rail Bolt Wrench Material Stainless Steel Dimensions (L x W x H) 830*280*380mm Petrol engine Two stroke petrol engine Rated Revolution 12000r / min Rated power 3.6kw Spindle speed 1130R / min Torque â?¥ 1800n. M