Camo exterior fasteners are designed specifically for exterior projects. Each screw starts fast, holds strong, and is backed by a Camo warranty against rust and corrosion so you can confidently use them in all of your decking projects, substructures, landscaping, fences, pole barns and more.1/4 in (4.06 mm) and 5/16 in (7.9 mm) structural screws for deck blocking, deck posts, beams, and railings, gardening and landscaping projects, and interior and exterior general construction projectsReplaces traditional lag screws and through-boltsSharp point starts fast with no predrillingSlashes reduce splittingHex head with washer locks into a hex driver, allowing you to drive without holding onto the screwHex drive reduces cam outs and drives easy