Ensure every machine with stable and reliable quality before delivery . We do the quality control job throughout the entire producing process by our dedicated QC department, including checking quality of the purchasing material, testing function of parts and the whole machine after assembled. They will check each small component and strictly control the assembling line to make sure each step works properly and the finished glass edger products are up to the quality standard before delivery. In order to achieve this aim, Wintech even has introduced a series of precision measuring tools such as length meter, level indicator, coating thickness meter, infrared thermometer, leeb hardness tester etc. After delivery, all of the machines are under one year guarantee.