Since 2010, Anpai Hardware has provided magnetic steel copper bushings (also called copper bushings) for nearly eight years for the world’s top three automotive motor suppliers, Dechang Electromechanical Co., Ltd., and the production volume has reached more than 100 million. The workpiece is mainly used in BMW car glass lifter motor. The coaxiality, cylindricity, surface dimensional accuracy and finish of this type of high-precision copper sleeve workpiece all have high technical requirements. Anpai Hardware manufactures strictly according to the P6 precision standard to meet the user's extreme requirements for workpiece accuracy. The user saves at least 50% of the processing costs and gains the trust of users.