Offering the most pristine finish with the smallest gaps between boards, our hidden 3mm Composite Decking Fasteners closely align deck boards with no visible fixings. Securely attaching your composite decking boards to their composite decking frame, the fasteners maintain a consistent minimal gap between boards for the ultimate neat and professional-looking finish, and the narrow gap left by the fasteners also conceals the aluminium joist or composite joist from view while still allowing efficient drainage. Made of weather-resistant stainless steel to prevent rust, the decking clips are also black zinc coated for extra protection and reduced visibility and comes supplied with a durable weatherproof large head screw. Each of our premium 3mm Composite Decking Fasteners is supplied with a fully threaded, large head self-drilling screw. Designed with a pointed tip to create its own pilot hole in the joist, the threaded screw eliminates the need for pre-drilled holes and effortlessly bores