... tooth and the outer row of teeth between adds a row of trimming gearHigh compressive strength, hard and ... as limestone, dolomite, sandstone, chert and otherWe are a professional company in supplying tricone bits,steel teeth bits,single ... carbide inserts on cone and the gauge make a good wear resistance largely extend the working life ... .7. Reasonable price and long working life. 9 7/8" tci tricone bit