... "certification and "UL" certification. Stainless steel hingeOur main products are Commericial Hinges, Square Hinges with loose pin, Round-Corner Hinges. Ball Bearing Hinges ... , like lasps&Staples, Tower Bolts, Hooks&Eyes, Door Pulls, Shelf Brackets, etc, are suppliable. Our factory has achieved ISO9002-2000 certification ...