Carbide diamond-cut router burrs made by Kyocera Tycom. Re Sharp

They are 3mm (.1181”) in diameter and have a fishtail endstyle.  

They are 1.5” long, and flute length of (.394”).  

These burrs are built for extended tool life in routing composite materials such as FR4 and some plastics. 

These routers include collet locating rings for quick tool change.