National Hardware N342-592 Extra Heavy Auto-Close Gate Hinge Set, 3-1/2", Black 1 pack Heavy Duty auto-close gate hinge Exclusive bearing design eliminates metal to metal contact Reduces wear and increases life expectancy by up to 500-Percent Bearings provide for smooth, quiet operation and remain dimensionally and structurally sound in hot and cold climates All metal parts are plated prior to assembly to enhance rust resistance