Power Pro 116936 Multi-Material Screws, Silver, 50 Piece 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. Features Recommended for interior applications: common applications include electrical, plumbing, and metal projects Pan head design with star drive provides an exposed finished look and strong draw down power Patented design with spiral flutes, serrated hi-lo thread, and 3-sided pyramid point No pre-drilling required in wood, drywall, plastic, and metal up to 20 gauge Each One Screw item comes in an innovative plastic package that is reusable, re-closable, and stackable for post purchase use USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.