The GRK R4 2-1/2" x #9 Multi-Purpose Framing Screw is the ideal screw for various wood to wood fastening projects where secure holding power and structural strength are important. The Fast Bite Tip eliminates pre-drilling and provides a fast start for one step installation. Combined with the W-Cut™ low installation torque allows these screws are installed quickly and accurately. The GRK Climatek™ coating provides superior corrosion resistance, allowing the screw to be used in both interior and exterior applications as well as pressure treated lumber. Fast bite tip eliminates pre-drilling and provides a fast start for one step installation W-Cut™ low installation torque allows for fast driving and ease of install Precision Fit between R4 Multi-Purpose screws and GRK bits reduces wobble and improves productivity For use in wood, particle-board, plastic, sheet metal, cement fiber board, wood decking, composite decking, and melamine Limited lifetime guarantee Climatek™ All Weather Coating AC257 Treated Lumber Approved T-25 Bit included ESR-3201 approved for structural applicationsInformation Brochure R4 Technical Drawing