... (degree): 4.46, 6, 7 , 11, 122) shank size: hex 22mm*108mm/25mm*159mm3) length: 0.4m-10m Different rock ... 39,40,41 Integral Drill Steel is used by a hand held drill machine in Underground mining and for small ... with small power rock drills, like air leg rock drills, hand held rock drills, etc. It can reduces the expense of ... to get good drilling performance. International Drill Pipe/mining tools in soil