Used on White Oak. Very sharp, cuts very smoothly. It is long for my router as it is designed for a CNC machine. Added padding between the router and the bottom of my router table. The shank is 3/8" and may require a new collet for your router. Will not fit 1/4 or 1/2 collets. The cut quality makes the price worth it. Far outperforms most expensive "big" bits.