General description The CSPARKV 2pcs 80 Degree Folding Lift Support Black Spring Hinges are designed for versatile use in various furniture applications. These sturdy and durable hinges are made of stainless steel, ensuring they are rust-proof and non-corrosive. The invisible design offers a simple and practical solution for enhancing the functionality of your furniture. Technical specifications Material: Stainless steel Opening angle: 80° Quantity: 2 pieces (1 left spring hinge and 1 right spring hinge) Compatibility and accessories Suitable for folding beds Folding sofas Cabinet doors with lifting doors Other information Does not include screws.