Metal sectional connectors fit many different sofa styles (no less than 2 inches in connector section), securing sections together and preventing your sectional sofa from shifting. This sofa sectional sofa connector is mainly used for connecting sofa back and seat back.The height of the sofa back can be adjusted from sofa to bed.Suitable for connecting armrests with seat, backrest with seat, pillow with backrest, armrests with backrest, bed.shelves and bed surfaces. Thanks to the operation of the gears, it is possible to modify the angular adjustment between the armrests, the backrest, the pillows, the seat and the bed surface, installing the hidden safety.Designed with gear opening and closing positions, with multiple angles and multiple gears. Body Size: 5.4" x 2.1" / 137mm X 54mm (L*w);Triangle Nailing Plate Dimensions: 2.1" x 1.7" x 0.7"/54mm X 43mm X 17mm (L*w*h)