The straightening roll is a straightening equipment used for metal rods, tubes, wires etc. The straightness of the bars and other materials is changed by the straightening rollers. There are usually two rows of straightening rollers, which can be installed in different numbers. The straightening roll is a straightening equipment used for metal rods, tubes, wires etc. The straightness of the bars and other materials is changed by the straightening rollers. There are usually two rows of straightening rollers, which can be installed in different numbers.