These professional-grade GRK R4 multi-purpose screws are engineered for versatile use in wood, particle board, plastic, and sheet metal. Featuring a patented W-Cut thread design and Zip-Tip point, they eliminate the need for pre-drilling while reducing installation torque. The star drive head provides six points of contact to prevent stripping, and the Climatek coating ensures superior corrosion resistance for both interior and exterior applications. Each screw is designed with underhead cutting teeth for a clean, flush finish in the hardest materials

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