2pcs 5-Position Folding Sofa Bed Hinge Mechanism Adjusting Joint Hinge For Sofa Armrest, Headrest, Backrest Furniture Hardware Features: 100% Brand New High Quality Mainly used for angle adjustment of all kinds of furniture, according to different gears, used for different positions of furniture, generally used for various joint position adjustments such as armrests, headrests, backrests, etc. Departure angle 90 degrees: 3 gears, 5 gears, 7 gears, 8 gears, 10 gears; Departure angle 99 degrees: 7 speeds; 108 degree starting angle: 6-speed, 8-speed; 117 degree starting angle: 5-speed, 7-speed, 10-speed; 135 degree starting angle: 10 speed; Departure angle 180 degrees: 3 gears, 5 gears, 8 gears; The product is not divided into left or right, 90kg / 2pcs bearing package includes: 2pcs X Sofa Armrest Hinge