CAMO Marksman Pro Tool positions CAMO deck screws for side-angle entry to the deck board. For use with treated, hardwood, cedar, composite and PVC (polyvinyl chloride) deckboards. Dual screw guides fasten both sides of board with single tool placement. Clamping action grips deckboard. Heavy-duty, contractor-grade tool. CAMO Marksman tools are designed to use with CAMO hidden fasteners only.