For Use With Marksman Tools (Skus: 484.2662 And 518.9071). A Reverse Rake Tip Removes Deck Material As It Bores, Allowing The Screw To Penetrate The Board Without Splitting. The Star Drive Offers More Points Of Contact For Better Performance And Reduces Slippage And Wear. Aggressive Lower Thread Pattern Provides Superior Holding Power While The Reverse Upper Thread Pulls The Board Tight To The Joist And Provides A Clean, Finished Entry. Unique Trimhead Design Provides A Less Visible Point Of Entry.