GREAT's High-quality Bits Series III

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

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

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

Overview Roller bitGREAT has customized manufacture several types of roller bit . It is including 90 ° U-shaped Roller Bit, 120 ° U-shaped Roller Bit and Starry Sky Roller Bit.The 90 ° U-shaped Rol...