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

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.

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