High-quality Drill Bits from China

GREAT DRILL customized Rock reamers size from 10'' to 72''.

Hybrid drill bit conventional PDC and roller-cone bits. It is saving cost, Improves Drilling Efficiency.

Raise Boring Cutters OverviewThe raise boring cutters is mainly used for the construction of vertical shafts, ventilation shafts inclined shafts, pressure regulating shafts and escape shafts , and it...

Normally drag bits are 3 wings, but we can make 4 or 5 wings following your drawings or samples.