tungsten carbide burr for dental lab 1.shank diameter 2.35mm, ... yellow,blue,white,black,red 3.material YG8 Carbide Rotary Files/Tungsten Carbide Burrs is a new tape milling cutter with hign ... of metal and nonmetal.Etc.User Safety Tips1. When carbide rotary burrs are used in the wind-driven or ... electric tools ,we must clamping tool,and speed is allowed generally 6000-40000 r / min ...