Rock Bit, Button Bit, Chisel Bit manufacturer / supplier in China, offering 102mm Gt60 Hydraulic Bench Thread Button Rock Drill Bit, 102mmt51 Hydraulic Bench Thread Button Drill Bits, 36mm 7buttons Atlas Copco Machine Taper Drill Bits and so on.
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our 34mm 8buttons 12degree can drill 80 to 100 meters on granite,very hard rock type.
customers are satisfied.