The Cortex Hidden Fastening System is the fastest, easiest way to hide fasteners in composite, capstock, and PVC decking boards – now its 50% faster. Collated Cortex Plugs: FastenMaster Cortex plugs are now available on a collated strip. This minimizes handling and saves valuable time on the jobsites. TORX® ttap® Drive System: This system is almost impossible to strip-out. In addition, the stability button keeps the fastener straight through installation. Includes (350) screws (400) plugs (3) driver bits