[Composite Deck Fastener] These concealed fasteners are designed for easy installation of composite decks with grooves, ensuring that the deck looks well without visible fasteners. [Easy Installation] The fasteners are designed specifically for composite decks with joist spacing of 16 inches. The screws have been integrated into the fasteners to improve installation efficiency, you can adjust the installation method according to your specific needs. [Premium Material] The composite decking fasteners are made of ABS plastic, with stainless steel screws, sturdy and anti corrosive, with high strength and toughness, suitable for indoor and outdoor use. [Seamless Look] The fasteners can firmly secure your deck boards and provide suitable spacing between them. The black coated screw heads seamlessly blend with the deck board panel, ensuring a neat and aesthetically pleasing appearance. [Installation Method] Place the first row of fasteners in the center of each joist without fully tightening. Install the second row of fasteners in the same manner. Then go back and fully tighten the first row of fasteners, ensuring all fasteners are securely tightened for structural stability., Manufacturer: Jelquix