Jack is the main brand of sewing machine in the world. The quality is very good, the workmanship is very fine, and the service life is long whether it is spare parts or after sale. Sewing machine is a domestic brand, parts are easy to wear and tear, and the cost performance is not very high, so Jack is good.
Shanghai Shanggong Butterfly Sewing Machine Co., Ltd. is a China company that develops and produces sewing equipment, spare parts and special equipment for sewing machines.