Upgrade your deck with these hidden deck fasteners! This 900 - pack is perfect for 500 square feet of composite decking. Made of high - density polymer, they are durable and corrosion - resistant, suitable for indoor and outdoor use. The fasteners come with preset stainless steel screws and 2 drive bits, enhancing installation efficiency. They maintain the right spacing between deck boards and have black - coated screw heads for a clean look. Installation is easy: align the first row of fasteners in the centre of each joist, insert the second deck, and then tighten. Whether you're building a new deck or renovating an old one, these fasteners provide a high - quality, versatile solution for a beautiful and long - lasting deck.