Nova USA Wood Products’ new ExoDek QuickClip hidden fasteners are designed for use with the manufacturer’s grooved-edge hardwood decking products as well as other grooved wood, PVC, and composite deck boards. The maker says the spring clips compress with the natural swelling of wood deck boards, and then as the wood dries out and shrinks, the clips expand to keep the boards in place. Made with glass fiber–reinforced nylon, the fastener system can secure up to five rows of decking at a time. A box of 175 clips, 175 screws, and two 1/4-inch decking spacers costs between $120 and $130.