General description These 2 pairs of 3-inch stainless steel swing door hinges are designed for double action, making them perfect for salon, cafe counters, and other applications requiring self-closing doors. They are adjustable and suitable for free-standing doors, swing doors, shed doors, and bar counter doors. Technical specifications Material: Stainless Steel Size: 3 inches Door thickness compatibility: 20mm to 35mm Number of hinges included: 4 pcs Required screws: 32 pcs Required demolition bars: 2 pcs Installation Easy to install with the required screws and demolition bars. Adjustable spring tension for independent return in both directions.