Deckfast Deck Screws for Metal Framing - Accessory Pack are designed to attach PVC, composite and hardwood decking to steel and aluminum framing, including Trex Elevations steel deck framing and Wahoo Decks and Docks aluminum joist systems. Deckfast Metal is the first line of deck screws designed specifically for this application. Deckfast Metal screws are made of Grade 410 stainless steel and feature extra deep star drive recesses, undercut heads, drill points, and a color matched epoxy-based polymer resin coating over zinc plate. The original 1-5/8” long Deckfast Metal screw is the leading fastener for attaching one-inch decking materials to metal framing systems.