The GRK Fasteners R4 Multipurpose Screw combines patented cutting technologies and a precision star-drive head to deliver fast, clean installations in a wide variety of materials. Its self-countersinking bugle head with underhead cutting teeth and six pockets cuts a perfect pocket every time, while the Zip-Tip™ point eliminates pre-drilling and gets your job started instantly. The unique W-Cut™ thread design and CEE Thread™ geometry reduce driving torque, let wood fibers settle around the smooth shank, and lock the fastener in place with superior draw strength. Finished in GRK’s exclusive Climatek™ coating, these screws resist corrosion even in treated lumber, making them ideal for both interior and exterior framing, decking, cabinetry, and general carpentry tasks.

Whether you’re building a fence, installing deck boards, or putting up cabinets, the R4 ProPak offers industrial-grade performance and durability in a convenient 275-piece pack.

Key Features

• Self-countersinking bugle head with underhead saw-blade teeth and six cutting pockets for clean, crack-free countersinks
• Zip-Tip™ point eliminates pre-drilling and provides a one-step fast start
• W-Cut™ thread profile reduces torque demand for faster driving and less splitting
• CEE Thread™ enlarges the hole for the smooth shank, improving draw strength and material settlement
• Climatek™ corrosion-resistant coating for treated lumber and intermittent exterior exposure
• Precision Star Drive™ fit minimizes wobble and cam-out for higher productivity
• Multipurpose: works in wood, particle board, plastic, sheet metal, composite decking, cement board and more
• Suitable for interior and exterior remodeling, structural framing, porches, patios, decking, and fencing