EXTREME4 Ipe Clip hidden deck fasteners with a 5/32 in. gap are trouble free and simple to install, giving DIY homeowners and contractors a professional looking deck finish, which is blemish and fastener free. EXTREME4 fasteners use an edge mount method for attaching hardwood deck boards, making these deck fasteners nearly invisible when installed. The patented design acts as camouflage between board gaps, keeping the fastener out of sight. EXTREME4 are injection molded from a polypropylene resin, providing a malleable coating that further improves chemical and UV resistant properties. EXTREME4 hidden deck fasteners are manufactured with a rigid stainless steel insert, protected with black oxide coating. This ensures a long lasting hold-down between decking and joists. The EXTREME4 is tested to be up to 3 times stronger compared to other edge-mount fastening methods. Boards are secured on a single side only, enabling the naturally occurring expansion and contraction of wood decking. As a biscuit fastener, these slide into the board's edge groove. Builders can router the 5/32 in. side slot, utilizes a biscuit joiner or purchase panels with pre-grooved edges. Deck screws are installed at a 45 angle through the EXTREME4, down into the base groove edge of the board and into the joist below. Installation of each successive deck board against the EXTREME4 fastener continuously guarantees gap spacing due to the fasteners gap spacer leg.