GRK R4 multi-purpose construction screw with patented underhead cutting teeth that transport drill dust away from the screw hole while cutting a clean, splitting-free countersink. The Climatek triple-barrier coating provides extended corrosion protection for both interior and exterior applications.

• Size: #8 x 1-1/4"
• 110 screws per box
• Star drive head resists cam-out - free drive bit included with every box
• Self-countersinking head with patented underhead cutting teeth - no pre-drilling required
• Type-17 auger tip cuts smoothly through hardwoods and engineered materials without splitting
• Drives cleanly in wood, composite decking, particle board, plastic, and light sheet metal
• Climatek-coated for extended corrosion protection - rated for interior and exterior use

Versatile fastener for decking, sub-floor, stairs, framing, finish work, fence assembly, cabinet installation, and general residential construction. GRK's one-screw solution designed to replace multiple specialty fasteners on the jobsite.