When closed, the speed of the lid ' s closure can be adjusted using a wrench, enabling a slow close hinge buffer function to the lid from shutting quickly and injuring fingers Made from zincs Alloy, anticorrosion and rustproof, quiet and smooth Not easily deforme Supports a 180° opening Simply adjust the tension by rotating the screw in the middle of the arm with a wrench, turning the screw clockwise to increase tension, or counterclockwise to reduce tension Suitable for cabinet, wardrobe, toy box, wooden box hinges, toy box hinges soft close, bookshelves, filing cabinets, storage cabinets : Simply the installation position before proceeding, then secure the hinge in place to meet your desired angles, Manufacturer: amangul