7 11 12 Degree Tapered Drill Bit 7 Buttons 38mm
7 11 12 Degree Tapered Drill Bit 7 Buttons 38mm 36mm 34mm Taper Button Bits . Tapered drill bits are widely used in mining and quarrying, with the advantages of higher driving efficiency, long service life, better powder exhausting and easier bit back, which combine well anti-wear and anti-impact carbide butttons and high-performance steel together.
Get Price