GREAT's High-quality Bits Series II

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

PDC Reamer is the perfect tool for large diameter HDD bores. The size of the reamer is ranging from 12" to 50".

RC PDC bit from GREAT are manufactured from AISI 4145H heat-treated steel.

Core barrel with roller bit is used in very strong rock formations(compressive strength > 100Mpa)