HeadLok is a heavy duty structural wood screw that is ideal for many wood applications including deck framing, stair stringers, attaching rigid foam (SIPs), fences, kitchen cabinets and more. The HeadLok flat head fastener requires no predrilling and offers higher design. The SpiderDrive System contains 8 points of contact, maximizing bit fit and reducing stripping. HeadLok zips right in and creates a great finished look. UPC: 608309410584 Manufacturer Part No: FMHLGM412-50 Brand Name: FastenMaster Sub Brand: HeadLok Length: 4-1/2 in. Head Type: Flat Head Finish: Galvanized Product Type: Deck Screws Driver Bit Included: Yes Packaging Type: Boxed Self Tapping: Yes Indoor or Outdoor: Indoor and Outdoor Material: Steel Thread Type: Coarse Self Drilling: Yes Number in Package: 50 pk Drive Style: Spider Color: Black Discovery - Convenience, California residents see Prop 65 WARNINGS