first tested and broken through on a pine tree. a pass in a 2 HP Bosch router Then some maple. The HP number is a bit low, I had to use my Festool 2200 to do a real test on a thin strip of wood where the bearing makes contact and made a two pass cut, worked like a charm, perfectly rounded and smooth Cut . The bit dissipates heat very well. In Aman or Whiteside this racket will be 2-3 times more expensive. Installation can be tricky, use the 1" radius rod as a guide for setup. this manufacturer and I am a sharp critic of the tool.