... molding the drills for heavy-duty rock drill: detachable bits used for deep hole drilling, rock drill trolley etc.YG8CK2014.5-14 ... 2020≥86.5Qualified for hard rock drilling, steel bars with high compression ratios, pipe drawing, punching tools, core cabinet of powder ... bars and tubes, also for manufacturing mechanical parts, tools and wear parts.YG1014.588.52400YG1514872800For drawing steel bars ...