Pieces Tabletop Piano Quick and Durable Installation for

Sofa joining hinges: Suitable for connecting armrests and seat, backrest and seat, pillow and backrest, armrests and backrest, folding support hingeFolding furniture hinge: Because sofas are permanently joined by these hinges, a sofa can be easily extended in seconds and folded in seconds, self-locking hingeFolding sofa accessory: Provides long-lasting durability and strength, offering long-term service, black sofa angle adjusterSofa hinge: Easy installation, uses a gear opening and closing position card design, multiple angles, multiple ranges, sofa angle mechanism hardwareMounted hinge: Made of iron material, this item is suitable for many folding sofas and tatami mats, furniture accessory