High-quality Drill Bits from China

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

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

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

Overview Starry Sky Roller BitGREAT has customized manufacture 90 ° U-shaped Roller Bit, 120 ° U-shaped Roller Bit and Starry Sky Roller Bit.The Roller bit mainly used for Rock reamer (Hole opener) ...