R32 Threaded Button Drill Bits Carbide Button Bits Top Hammer
Drilling tools with Diameter 45mm for Hard Rock Mining
Threaded drill bits include general,retrac and reaming three
series,with stronger button-fixing ability,longer service
life,better wear-resistance and impact-resistance
performance,widely used in tunneling,underground mining,open pit
mining,anchoring and other large-scale construction projects.