Hidden deck fasteners with a 3/32 in. gap are a simple install process. They allow homeowners a top-of-the-line, fastener free deck finish. EXTREME Ipe Clip BLACK fasteners utilize the edge-mount system for fastening hardwood boards. This makes these clips nearly invisible. This particular design works as a camouflage between board gaps, perfect for keeping the fastener unseen. EXTREME fasteners are manufactured using a resilient polyethylene, further maximizing ultraviolet ray (UV) and chemical resistant assets. The EXTREME is molded with a black oxide coated stainless steel insert. This stringent steel insert helps enable the fastener to securely attach deck boards to joists for long-lasting hold down. Put to the test over other top edge-mount fastening systems, the EXTREME is proven to be up to three-times stronger. During the EXTREME installation process, deck boards are secured only on one side. This will allow the natural expansion and contraction of hardwood. Because this is a biscuit fastener, it sits inside the edge slot grooves of hardwood boards. On-site installers can groove the 5/32 in. edge slots into decking boards themselves with a router or biscuit joiner. Purchasing pre-grooved deck boards is also a possibly. At a 45° angle, deck screws are secured down through the EXTREME, downward into the bottom groove slot of the deck board and right into the deck joist. As a result of the fasteners integrated spacer leg, the EXTREME guarantees uniform gap spacing.