Shenzhen Rongshang Precision Hinges Co., Ltd. was founded in 2014, mainly engaged in R&D, manufacturing and sales of constant torque hinges. Its products are widely used in automotive, electronics, medical, aviation and other industries.The main customers of the service are BYD, Bochi , HeDa , Kaiyuan and so on . Since its inception, Rongshang has formed its own core competitive advantages with a strong technical team, advancing with The Times of high-end manufacturing and measuring equipment with strict quality system, to provide customers with efficient and high-quality services. With fast and efficient communication, reasonable cost, comprehensive and flexible service as our philosophy, we help our customers achieve their goals in a short period of time, thus enabling them to gain a strong competitive advantage. The constant torque hinge , as position control hinge , which is long usage life , torque variation is less than 20% after use 20000 cycles , can provide the steady torque in the whole movement range , and make the user to fix door , panels , screen and other components in any angle that you need easily , whatever in a full open/close position or in the middle of them . The constant torque hinge has all kinds of size , material and torque range that can be chosen to meet the different applications.