... carbide burr for dental lab 1.shank diameter 2.35mm, 2.teeth type:green, yellow,blue,white,black,red 3.material YG8 Carbide ... Rotary Files/Tungsten Carbide Burrs is a new tape milling ... 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, ...