Sollroc 203mm 8" Black Color High Air Pressure DTH Drill B

203mm 8" Black Color High Air Pressure DTH Drill B Specification: Bit Diameter: 203mm 8'' flushing hole (No.* Button Dia.mm): 2*30 No.* Button Dia. mm: Gauge Buttons 10*18mm + Front Buttons 8*18mm + 6*16mm Weight (kg): 47 Advantages: 1.Durable The alloy steel is very strong and has long service life. 2.easy operation Strong torque, head design rich for different geological needs. 3.Well made Standard of work size. Reduce wear and tear to screws and extend service life. 4.Complete specifications Different sizes and sizes. Meet the needs of different airlines.