Button Bit, Drill Bit, Drill Rod manufacturer / supplier in China, offering Yellow 32/34/36/38/40mm 12 Degrees Premium Quality Rock Drill Tools Taper Button Bit for Mining, Golden 32/34/36/38/40mm 12 Degrees Mining Drill Bit Taper Button Bit, High-Quality R25 38mm Rock Drill Button Bit for Mining and so on.