TruClose heavy duty round post hinges are designed to fit a wide range of common round-posted gates and fences. Creates a self-closing gate where no gate closer is necessary. The spring tension is easily adjustable. Made from a high-tech polymer (UV stabilized) for excellent weather resistance. Springs and internal parts are stainless steel. Hinge is self-lubricating. Each pair of TruClose gate hinges are packaged as a kit which includes shims, adapters, instructions, and fastening screws. These hinges have been independently tested to comply with strict safety standards, especially those relating to stringent swimming pool safety codes (always check with your building department for your local building code requirements) Weight Rating: 154 lbs per pair Small Diameter Model: Fits post diameters of 1-7/8" to 2", 2-3/8", and 2-7/8". Fits gate frame diameters of 1-3/8" and 1-5/8". Hinge measures approximately 5" tall by 4" wide. Large Diameter Model: Fits post diameters of 1-7/8" to 2" and 2-7/8". Fits gate frame diameters of 1-7/8" to 2". Hinge measures approximately 5" tall by 4-1/2" wide.