... kinds of tungsten carbide mould, precision tools and blanks, the main products are tungsten carbide ring and rollers, strips, blade, drawing dies ... the drills for heavy-duty rock drill: detachable bits used for deep hole drilling, rock drill trolley etc.YG11CK4014.0-- ... ≥86.5Qualified for hard rock drilling, steel bars with high compression ratios, pipe drawing, punching tools, core cabinet of powder ...