CAMO® Deck screws create a beautiful, fastener-free deck surface. Easy-to-install using either of the Marksman® tools(sold separately ). CAMO® secures deck boards directly to the joist to reduce board movement and they back out easily in the event a board needs to be replaced. No pre-drilling is required and CAMO® deck screws come with a Limited Lifetime Warranty that assures against rust and corrosion for the life of the project. This is a trim head, T15 drive, 1-7/8 in. Carbon Steel Protech-Coated screw.