With its built in 5/32 inch gap spacer leg, installing the EXTREME4 Ipe Clip hidden deck fastener clip is simple. Contractors and DIY home-owners are given a high end hardwood decking surface that is free of face screws. In order to attach hardwood decking boards, the EXTREME4 fasteners utilize an edge-mount system. These are crafted with a hardened stainless steel insert coated in black oxide. Deck screws are installed at 45 degrees through the fastener, down into the joist.