TimberTech Cortex Screws For Composite - Weathered Oak are specially designed for composite decking, providing a strong and hidden fastening solution that enhances the overall look of your deck. These screws feature high-quality, ACQ- specialty deck screws with a TORX ttap drive system, ensuring long-lasting durability and reliable performance in outdoor settings. for use on stairs and perimeter boards, the TimberTech Cortex Screws maintain a clean, polished appearance while delivering exceptional strength and stability to your composite decking project. Model Number: CTC100LFWO