T38 76mm Thread Button Drill Bits Long Primary Drilling Time For Bench Drilling

T38 76mm Thread Button Bits Button Bits from PRODRILL for Bench Drilling, Long Hole Drilling Underground Description: Rock drilling tools factory ProDrill manufactures rock drill bits: T38 Threaded Button Bits is the most important size for benching and long-hole drilling underground. Diameter 64mm 76mm, 89mm, Skirt body: retrac, and normal, Face type: flat, uniface, drop center Carbide shape: Dome, ballistic, semi-ballistic Used in bench drilling, underground long hole