Cortex Plug Hidden Fasteners - for Azek Acacia -350 Plugs & Screws for 100 sq ft. of Decking Combines the strength of a face-fastened screw with the beauty of a hidden fastener Plugs are manufacturered from actual AZEK deck boards All screws, plugs and setting tools are included in each box - NOTHING ELSE NEEDED! Concealed deck fastener kit includes 350 screws 2-1/2" star drive, 400 plugs, and 3 setting tools