Hillman 116815 Multi-Material Screw POWERPRO ONE 1/4" X 3-1/2" L Star Flat Head Bronze

Engineered for optimum performance in multiple materials Power Pro One screws are the One screw you'll ever need. Developed to outperform and replace standard wood sheet metal and concrete/masonry screws the One Screw program simplifies your tool box by using a single innovative engineered screw design to satisfy projects that fasten into wood metal concrete drywall and plastic. The bronze epoxy coating is recommended for exterior projects and treated lumber (Not recommended for marine applications or projects within 5 miles of coastal waters). The flat head design and star drive provide easy and clean countersinking into wood. Manufactured with spiral flutes serrated hi-lo threads and a 3-sided pyramid point no pre-drilling is required in wood drywall plastic or metal up to 20 gauge thick. Concrete and masonry applications require a pre-drilled a hole see product packaging for pre-drilling instructions.