Engineered for optimum performance in multiple materials, PowerPro® 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. Stainless steel is the best choice for marine applications, or projects within 5 miles of coastal waters as its material makeup contain anti-corrosive properties. 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. Each package includes a free durable Pro-Stik Star Driver Bit. All One Screw products offer a limited lifetime warranty.