GREAT's High-quality Bits Series II

This is a 7 blade Matrix body PDC bit , with Stinger cutters back row, used for very abrasive formation.

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

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

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