GREAT's High-quality Bits Series I

Popular Size: 1305, 1308,1613,1616,1913

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

This type of Bi-center bit mainly used for medium to medium hard compressive and abrasive formation.

Overview 120 ° U-shaped Roller bitGREAT has customized manufacture several types of roller bit . The traditional roller bit was cut by tricone bit . So it is including No.1 ,No.2, No.3 Cone cutters ....