GRK R4 ProPak Multipurpose Screws, 9 by 2-1/2-Inch, 575-Count by GRK

• Self tapping, countersinking head; W Cut thread design
• Climatek coated for all weather corrosion protection conforms with ICC#2442
• For use in wood, particle board, cement fiberboard, plastic, and sheet metal
• International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

GRK R4 Multi-Purpose Screws are self-tapping with a countersinking head. They require no pre-drilling. This self-countersinking screw has a new underhead with saw-blade like cutting teeth and six self-contained cutting pockets. This transports the drill dust away from the edge of the screw hole while cutting a perfectly clean hole without cracking the surface. The screw head closes the hole off with precision, leaving no damaged fibers around the head. The R4 is available in 59 sizes and works well in wood, particle board, plastic, sheet metal, cement fiberboard, composite decking, wood decking, and melamine. Some sizes are available in PHEINOX Stainless Steel.