*For optimal results and maximum insert life, replace inserts with optional general purpose knives #AMA-12 (sold separately).
4-sided solid carbide insert knives
Exclusive carbide grade for highest quality of cut
Maximum cutting efficiency
Faster material removal process
These industrial router bits feature solid carbide insert knives with four cutting edges that allow users to rotate the knife when one side becomes dull providing the highest-quality finish available on woodworking tools.
Proper torques rating to tighten down screws is 2-3Nm Torques.