NLB-600 universal power wrench can quickly and easily tightens and loosens all wrenched joints along the track. Accurately controlled and stable. This machine uses gasoline engine as power, the output shaft is single -head, single-speed, forward and reverse adjustable, output torque can be manually adjusted and accurately displayed, the whole machine is easy to operate, safe and reliable, and convenient to go up and down, and can be equipped with lighting lamps for supply Lighting at the sleeve head during night work.