steel SELF-LOCK: Our folding bracket is designed with a self-locking function, when you fold the legs of the table, the bracket will be locked automatically. SUPERIOR MATERIAL: Foldable bracket is made superior thick steel plate, which is sturdy & solid, and not easy to fall. HIGHT LOAD-BEARING: High-quality heavy duty design for folding table legs, each pair of brackets could hold 500 pounds capacity. QUICK & EASY INSTALLATION: The package includes brackets and screws, and you only need to spend a little time to install it quickly. WIDELY USE: Perfect for furniture foldable table or bed legs, workbench, DIY platform and other extensive applications, also can be used as a simple invisible bracket. 8 Pack Folding Shelf Brackets, Heavy Duty Lock Extension Support Black Folding Table Legs, Adjustable Furniture Legs for Table Bed Leg Cabinets, Workbench, Foldable Bracket