Check the listing for details. GRK Fasteners R4™ #9 x 2-1/2 Inch, Multi-Purpose Framing Screws, 575 PCS, Rust. Color: Gold, Condition: New. Listed at 57.85 USD. The GRK R4 Multi-Purpose Wood Screw is a professional-grade structural fastener designed for framing, decking, and construction projects. These premium screws deliver superior performance in both interior and exterior applications, including deck building, fencing, and general carpentry. GRK’s Climatek™ coating, provides exceptional corrosion resistance, making these construction screws ideal for pressure-treated lumber, cedar, and all other wood applications. The patented Fast Bite Tip and Zip-Tip™ technology eliminates the need for pilot holes, while the W-Cut™ design ensures smooth, low-torque driving in all wood types. ICC-ES ESR-3201 approved for structural applications, these self-drilling screws are trusted by professional builders and DIYers alike.