Headrest of the sofa bed with adjustable angle hinge, can be adjusted to the desired angle at any time. The adjustable lifting rod hinge, which is easy to install and use and provides good support performance. Using high-quality iron materials, rust-proof, corrosion-resistant, durable, not easy to bend and break. Lifting frame hinge bracket, with high hardness and wear resistance, continuous use. Multi-purpose, suitable for adjusting sofa backrest, bed back rest or DIY furniture., Manufacturer: Shanrya