... Shank dia:3mm,6mm dental burrs,tungsten carbide sand wheel(1)used for foundry grinding, grinding disc, oil nozzle and other irregular ... 2)The major characteristic: hardwearing, strong power for grinding. (3)Application: metals grinding, mend etc.(4)Diameter of shank:Φ3mm,Φ6mm ... )WA(white fused alumina), A(alumina),GC(green silico carbide) More product pcs:manufacturer specialized in Roll taps, spiral ...