Shank diameter: 6mm, cutting diameter: 32mm (1-1 / 4 ""), blade height: 4mm / 6.35mm, total length: 50.5mm (2 "). Fully enclosed, lubricated rod bearing ideal for use with a hinged jig. Cut slots and grooves for carpentry and other general uses. Premium C3 Micro Grain hard metal bur with silver induction for maximum weld resistance. Use on CNC and other automatic routers as well as portable and table cutters.