mill tooth bit

7 1/2" milled tooth rock roller bit for oil drilling Specifications steel/ milled tooth tricone bits Rock roller drill bits Certificated by ISO9001:2000 and API Products covered all IADC codes Specialized in single bits, tri-cone bits and PDC bit 1. Material: tungsten carbide 2. Various types for different formations 3. Cutting structure: The durability of premium tungsten carbide insert is improved with new formulas and new techniques for insert bit 4. Gauge structure: