Our C&Z section roll forming machine is different from other manufactures.Our machine adopt pre-cutting, which can be used for a longer time than after-cutting.For after-cutting, when the cutter was used for settled times it will be out of use and you need new mould. Its troublesome to change the new mould and its expensive. Our machine cuts before the C&Z shape is formed,so that the cutting part can be much saved. Our machine can cut about 500,000 times, whereas the machine from other manufacturers can only cut 20,000 times at most. This pre-cutting technique was invented by our big boss, and in China only we master this technique.