.gb-wrap{max-width:100%;font-size:15px;line-height:1.6} .gb-wrap h2{font-size:1.25rem;margin:0 0 .6em} .gb-intro p{margin:0 0 .9em} .gb-acc{border-top:1px solid #ddd;padding:.65em 0} .gb-acc:last-of-type{border-bottom:1px solid #ddd} .gb-acc>summary{cursor:pointer;font-weight:600;list-style:none;padding:.2em 0} .gb-acc>summary::-webkit-details-marker{display:none} .gb-acc>summary::after{content:"+";float:right;font-weight:400} .gb-acc[open]>summary::after{content:"\2013"} .gb-acc .gb-body{padding:.4em 0 .9em} .gb-wrap ul{margin:0 0 .9em 1.1em;padding:0} .gb-wrap li{margin:.25em 0} CONCEALoc Groove Cutting Router Bit Cuts a CONCEALoc-ready groove directly into square shouldered or field-cut TimberTech boards, so any edge can take a hidden fastener even after the board is already down. Specifications Carbide-tipped, 3-wing cutter with sealed bearing, 1/4 in. shank Cuts the exact groove profile CONCEALoc clips are sized for Can be used on boards already installed on the joists Built for TimberTech composite and PVC decking Questions What router does it fit?Any standard router that accepts a 1/4 in. shank bit. Why would I need this?To add a hidden-fastener groove to a cut edge, picture-framed board, or square shouldered board.