... suitable for working with gray cast iron, steel alloys and stainless steel etc. Zhuzhou ZZ Hardmetal, which was established ... carbide burrs, etc. Along with our company growth, we hope to build business with more companies abroad .We make carbide rods ... , diameter from 1mm to 30mm, length in 330mm usually, grade in K10 to K40UF tungsten carbide rods with coolant holes in blanks and fine grinding