GRK KAM-418U(CG8C) Kameleon HandyPak 9 by 2-1/2-Inch Composite Deck Screws, 100 Screws per Package, Grey Use GKR Bit T-20 Self-Tapping with fiber trapping rings W-Cut Thread Design with Zip-Tip Patented Climatek coating Composite and PVC deck screw