Full hydraulic Drilling Rig Suit for 8-10T Excavator Apply to drill the rock(sandstore,shale and limestone) Main Features: ... convenient for adjusting the tension and tighten of the crawler,resistant against impsct,more stability,reliably using and is ... ,accurated control,the hydraulic pilot vale system can achieve the elaborate workMain Paremeters Drill pipe length3660mm Drill typeThree blade cutting ...