The C-Deck Composite Deck Screws are for interior and exterior use with wood composite and other plastic materials. These screws are specially designed to eliminate the mushrooming and blemishes that can occur on composite materials. They are also an excellent choice for wood decks where the top threads work to pull down and hold warped lumber and lock the boards together. A multipurpose fastener which meets the challenge regardless of the material used.Features C-Deck Color Matched Exterior Coated Composite Deck Screw Star Drive offers twice the torque over Phillips or square drive screws Starts Easy and Drives with Less Torque Eliminates Composite Mushrooming and leaves a smooth flush countersuck finish Excellent Performance in all plastic composite decks and wood Size - #10 x 2-3/4 in. Bit - T20 Qty - 75 Finish - Walnut - SKU: SRWP185