These pipe wrenches are used to disassemble and assemble pipes and fittings. They are made how the American Pipe Wrench is generally made. The maximum jaw openings range from 25 mm to 1200 mm in size. All of our tools are guaranteed 100 % and meet the requirements of testing under GB 10686-89 of China. This wrenches avoid sparking when struck, rubbed or collided with other objects. This is useful for oil and gas works, petro-chemical plants, explosive manufactures, mines, shipyards, pipeline construction, armed forces, pharmacy, medical , airports and many other industries.