FastenMaster HeadLok 4-1/2 in. L Black Spider Flat Head Deck Screws 50 pk

HeadLok is a heavy duty wood screw that does it all with an internal drive and flat head. HeadLok zips right in and is ideal for many wood-to-wood applications including decks, fences, SIPs, kitchen cabinets and more. The patented SpiderDrive eliminates cam-out and improves installation speed.