100 Pack, 5/16" x 4", Construction Lag Screws, Perfect For Your Next Outdoor Project, Common Applications Include Decks, Stairs & Playsets, Impressive & Unique, Topping The List Is The New Star Drive Technology Which Virtually Eliminates Cam Out For A Smooth, Effortless Drive Every Time, Chances For Splitting Wood Are Greatly Reduced By The Patented Cross Cut Threads & The Wood Biting Cut Point, These 2 Features Combine To Prevent Wood Splitting By Grinding Wood & Removing Fibers From The Hole, Use With Treated Lumber.