Multi Functional Split Spring Hinge Safety and load bearing: Thickened steel plate provides safety and firmness with strong load bearing for heavy lids and doors, delivering reliable support during use. Smooth, quiet operation: Opens to an angle of 80 degrees with smooth lifting and lowering, and operates quietly to avoid disturbing others. Durable, rust resistant finish: Black baking paint resists rust and fading; bold rivets enhance stability and contribute to long lasting performance. Long lasting and elegant: Built to withstand daily use; the black finish adds a touch of elegance to any furniture piece. Secure, stable support: Thickened steel plate design ensures safety and stability to securely hold and support heavy furniture items. Use scenarios Lift sofas, sofa storage compartments, and storage cabinets that require controlled opening and reliable support. Heavy cabinet doors in living rooms, offices, or workshops where smooth, quiet operation and durable hinge performance are important. Any furniture piece where a strong, reliable hinge with a controlled opening angle enhances usability and reduces noise during operation.