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

PDC Hole Openers, are used to enlarge the pilot hole in Horizontal Directional Drilling(HDD).Widely used in construction, bridge, highway and railway construction.

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

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