Sudong Smart Tightening Technology (Guangdong) Co., Ltd.Located in Songshan Lake, Dongguan, founded in 2007, it is a professional high-tech enterprise integrating the R & D, production and sales of intelligent servo electric screwdriver, intelligent servo tightening shaft, rechargeable intelligent wrench, industrial brushless constant torque electric screwdriver, torque tester, intelligent tightening data acquisition software and surrounding supporting products.