Award-Winning Router bits and router bit sets, offered in 1/4", 1/2" and 8mm shanks C.N.C. machined bodies from solid high strength steel bars, we do not use castings! Multi-Axis automated carbide grinding for ultimate sharpness and life Induction brazing ensures the strongest bond between carbide tips and steel bodies Silver non-stick coating delivers years of trouble-free service and easy maintenance Our Bird's Mouth router bits get their name from the unique shape that they cut. Unlike traditional joinery router bits, the Bird's Mouth bits are designed to cut all types of mitered joinery from coopered round columns to mitered cabinet corners. Infinity Tools offers setup blocks for all three bird's mouth Router Bits eliminating guesswork and making setup a breeze.