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. This zinc plated screw is ideal for interior applications; it is not recommended for exterior projects or treated lumber. Common applications include electrical, plumbing, and metal projects. The pan head design and star drive provide an exposed finish look and strong draw-down power. 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.