FastenMaster Cortex 2-3/4 in. L Torx TTAP Star Head Brownstone Hidden Deck Fastener 1050 lb.The cortex hidden fastening system is the fastest, easiest way to hide fasteners in composite, capstock, and PVC decking boards. Cortex offers a strong connection between the deck board and joist. It hides fasteners across the entire deck, first and last board, perimeter and stairs. UPC: 608309424109 Manufacturer Part No: Brand Name: FastenMaster Sub Brand: Cortex Length: 2 3 4 in. Head Type: Star Head Drive Style: Torx TTAP Container Size: 1050 per