heavy duty--make of thickness steel plate, each bracket could hold 500 pounds
self lock-- when you fold the leg, the bracket will be locked automatically. with screws
Use for Extension Table Bed Leg Feet such as kitchen, laundry room, retail/grocery stores, RV, boat, warehouses, industrial, garages, maintenance storage, office/residential storage). Apply them to table legs or surface for folding legs of DIY table or bed, folding workbench project, fold down desk extension etc.