This is a special high-quality, carbide router bit with a 1/8" pin in the exact center of the bit. The center pin rides in the track slot which keeps the router bit perfectly centered - the result is both "gains" are the same width around the entire layout (even in the corners). In contrast, using a router base with a 2 pin (leading/trailing) setup and a standard router bit will result in gains with different widths in the corners (one gain will be a little too narrow, the other gain a little too wide).
Note: The actual brand of the bit will vary; however, we only use high-quality, brand name bits.
IMPORTANT: The center pin in the special router bit is NOT designed to be bottomed out in the slot to set your gain depth (doing so will typically result in gains that are MUCH too deep). The center pin's SOLE purpose is to guide the bit. These router bits require a slot which is at least 1/4" (6.35mm) deep to work properly. The gain depth should be set using a scrap piece of MDF and a short piece of the actual braid you plan to install. Make some test cuts (slot and gains) using the scrap MDF to achieve the correct gain depth BEFORE routing the actual gains in your track.