T38 76mm Drop Center Ballistic Button Bit With Fast Penetration For Soft Rock Drilling Drill bits T38-76mm drop center Buttons: front 4x11mm, 1x11mm, gauge: 8x11mm 4 front flushing holes Retract body ...View More
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Soft Rock Drilling T38 76mm Ballistic Retractable Drill Bit With Fast Penetration