EXTREMEKD Ipe Clip brand BROWN hidden fasteners with a 1/4 in. gap offer DIY homeowners a smooth, deck finish. EXTREMEKD implements an edge-mount system for fixing hardwood deck boards to joists. This also makes these hidden clips virtually invisible. The specific design of the clip also functions as a camouflaging instrument between board gaps. This also keeps the clip hidden between boards. The fastener is constructed from durable polypropylene resin, additionally improving chemical and UV resistance. The EXTREMEKD is injection molded with a stainless steel insert coated in black oxide. This hardened metal insert allows the EXTREMEKD to affix boards to joists for a lasting hold down. Put to the test against other favorite edge-mount fasteners, the EXTREMEKD is found to have up to 3X more strength. Whenever installing the hidden deck fastener, deck boards are attached merely on one side. This allows the natural expansion and contraction of hardwood decking. Biscuit fasteners such as the EXTREMEKD, sit inside the edge slot of deck boards. Contractors may select to cut the 5/32 in. edge slots themselves. This can be done with a router or biscuit joiner on-site. Purchasing pre-grooved deck boards is another option. At a 45° angle, screws are inserted through the Clip, down into the lower groove edge of the board. Then, into the joist. Due to the fasteners unique spacer leg, continual fastening of each deck board lengthwise with the EXTREMEKD, results in uniform gap spacing.