Pro-Twist Construction Fasteners are engineered for professional-grade use in commercial, industrial and residential applications. Whether the job involves drywall, steel framing, mobile home construction, electrical or plumbing work, plastering or metal roofing, Pro-Twist has the optimal fastener for every situation. The Grip-Rite Pro-Twist No. 12 Sizes X 1-1/2 in. L Hex Hex Washer Head Sheet Metal Screws are perfect for a wide range of applications. With a hex head and washer head, these screws provide a secure grip and are perfect for attaching metal to metal. The Pro-Twist design provides superior holding power and a tight, secure fit.