1-Bit API or ISO 9001 2-Bit steel tooth bit 3-Bit IADC(117-437) 4-Bit high speed ... ,packing 4,Certificate:5,we can provide more size Steel tooth(IADC)111, 121,131117,124,126,127,136,137 211 ... 1)the size of the tricone bit.2)the IADC tooth model,like 537G3)plz tell the drilling information of the ... in the near future!!! API&ISO 8 1/2" Steel tooth kingdream tricone bit