GRK 772691021014, 9 R4 HandyPak Multipurpose Screws, 2-1/2-Inch, 100-Count

In addition to a Torx-head design that eliminates cam-out slippage, these innovative self-countersinkingbits feature six cutting pockets beneath the head and sharp, saw-like lower threads to drive through a variety of materials smoothly, without tearing. Ideal for exterior purposes such as building a deck. Available in several lengths and sizes. Torx/Star-head driver bits also available.The R4â„¢ is a multi-purpose screw that can be used in all woodworking and plasticapplications.Great for:WoodCement Fiber BoardParticle BoardComposite DeckingPlasticWood DeckingSheet MetalMelamineAdditional features:R4 CLIMATEKâ„¢ coated screws are tested and approved for all exterior applications including pressure treated lumber as stated in the ICC report #ESR-2442.Sub-head cutters create clean countersunk holes without damaging the surface- even in brittle materials.Eliminates pre-drilling in most casesFits perfectly into existing countersunk holes on hinges and other hardware fittings.Screws 2" long or longer have special CEE thread that enlarges screw hole andimproves performance.