Cut much deeper flutes than possible with a regular core box bit. Perfect for making flutes on CNC machines. 45944, 45946, 45948, and 45949 not for use in a handheld router. Bit number 45944, max RPM 20,000. Bit number 45946, max RPM 18,000. Bit number 45948 and 45949, max RPM 14,000.
