... ) Apply to soft-medium,medium-hard drilling information 6) Bit size:8 1/2"IADC code:5372,products details 3,Packingor ... steel box4,we can provide more size 5,size and model we can provide 60mm,65mm,76mm,93mm ... contact person8,plz add this formation in you inquiry1)the size of the tricone bit.2)the IADC tooth model,like ... the quantity. 8 1/2 215.9mm iadc 517 tricone drill bit