GRK Fasteners 3/8 in X 8 in. L Star Hex Head W-Cut Structural ScrewsThe screws are using self tapping specially hardened steel screw, W Cut thread design as zip tip, climatek coated, sharp threads and points to built in washer for interior or exterior use in carrying beams, ledger boards, stair rails, deck posts, playground equipment and other professional applications. UPC: 772691122872 Manufacturer Part No: 12287 Brand Name: GRK Fasteners Drive Style: Star Length: 8 in. Material: Steel Self Tapping: Yes Driver Bit