Quality control is the lifeblood of products. We, GREAT, will give you the best experience.

GREAT customized made Diamond core bits ,which including Matrix body and Steel body.

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

Steel body PDC bit is made by AISI 4145H heat treatment steel manufacture, it has lower cost compare with Matrix body PDC bit.

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 ....