Replacement bit for the CAMO® MARKSMAN system. Most boards do not require pre-drilling. Check our installation guide for pre-drilling recommendations.The CAMO MARKSMAN system hides your deck screws on the edge of the board. By shifting the fastener location from the deck top to the edge of the deck board, you are left with a fastener free deck surface that is less prone to splitting and cracking.Edge fasteners are hidden deck screws designed for ANY wood or composite deck top and any square or grooved board profile.Designed for grooved deck boards