The Freud Dia Grooving Shank 20 100 has been a game-changer in our woodworking projects .Based on our own EXPERIENCE this router bit has consistently delivered precise and clean grooves on every pass. The diamond cutting edge ensures extended durability, providing increased value over time. The only downside we have experienced is that it is slightly more expensive than other options on the market. However, the quality and performance make it worth the investment..