Yih Cheng Factory Co., Ltd. was established in 1951. Our major export products are Automatic Screwdrivers, Electric Tester Screwdrivers, Nut Drivers, Impact Screwdrivers, Magnetic Screwdrivers, Line Color Screwdrivers, Go-Through Screwdrivers / Wrenches / Spanners, Ratchet Screwdrivers and Screwdriver bits.