Composite decking and deck hardware has come a long way. In pursuit of the perfect deck, all Trex® decking lines come with a hidden installation option.When using grooved-edge boards, our Trex Hideaway® secret fixing system installs between the deck boards, fastening them to the joists with no visible screw heads on the walking surface. This precision also creates perfectly consistent spacing between the boards for a flawless look across the entire deck.