This product is a lift and up hinge. It is made of solid materials. It is safe and durable. It can serve you for a long time without being easily damaged. It is an excellent lift and up hinge that can bring you more convenience, allowing you to have a more comfortable experience. Features -Color:Black -Material:Steel -Size:14.80X4.30X3.30cm/5.82X1.69X1.30in -Made with stable and firm steel material, resistant to rust. Simple installation and disassembly. -Strong load-bearing, safe and reliable. Smooth edges will not hurt your hands when used. -It is suitable for folding beds, folding sofas, folding sofas, lifting door cabinet doors, and etc. -High hardness and wear resistance, not easy to break, no sliding wire, reliable and useful. -Every detail is carefully crafted, so you experience the high durability and practicality. Package list: 1 x Pair of Spring Hinges