Grteat BIt Drill Bit Shipping

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

Core barrel with roller bit is used in very strong rock formations(compressive strength > 100Mpa)

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

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 ....