NLB-300 type single head petrol engine rail track bolt wrench is suitable for loosening & fastening the tie bolt & nut of railway track. With features of powerful impact force and integrated operating system, it can supply the demand of the locking torque to fasten the rail fastenings conveniently and quickly. It adopts a traveling unit with 4 rotary wheels at the base. Therefore, it’s suitable for traveling on land as well as on rail with good mobility. It’s an ideal special tool to loosen & fasten the tie bolt & nut replacing the heavy manual labor.