API Standard Mill Tooth Tricone Drill Bits Customized Large Diameter With Three Cones

API standard mill tooth tricone bits used in oil , gas , mining , construction ,international quality SIZE IADC CODE PIN SIZE WEIGHT (kg.) 4 3/4” IADC517,547 2 7/8” 24.2 4 7/8” IADC547 2 7/8” 26.4 5 1/2” IADC547 3 1/2” 29.7 5 5/8” IADC547 3 1/2” 30.2 5 2/3” IADC546 3 1/2” 30.8 6” IADC417,447 3 1/2” 35.2 6 1/8” IADC547 3 1/2” 37.4 6 1/4” IADC517,537 3 1/2” 37.4 6 1/2” IADC517,547,817 3 1/2” 44 6 3/4” IADC517,537 3 1/2” 50.6 7 1/2” IADC517,545,547,625,627,835 4 1/2” 66 7 7/8”