Tungsten Carbide Tricone Rock Bit, Certification : API

We are offering 8 1/2" three roller cone bit api tci tricone rock bit. features and applications 1.precise tci tricone rock bit 2.full length/surface teeth hard facing 3.optimized profile and higher rate of penetration 4.better steel in use and longer stable drilling hours 5.good wear-resistance 6.higher stabiltiy 7.sealed journal bearing 8.qualtiy gauge protection on cones/shirt-tails our advantage 1.good quality,reasonable price. 2.iso9001:2000, api certified. 3.timely delivery.