Simpson Strong-Tie PRO300SD25K Quik Drive Collated Corded Decking System, BlackFor Decking On Decks and Docks, Subfloor to Wood or Steel, Wall Plates, Stair Treads, Sheathing, Fiber Cement Siding to Steel. Expanded depth settings for high density flooring materials. Reversible and replaceable non skid teeth. Uniform toe nailing and countersink on slick surfaces. Sure grip guide tube increases stability for a broad range of screws. Expanded depth settings for high density flooring materials Reversible and replaceable non skid