1,bit API& ISO 2,bit size 8 1/2 215.9mm 3,bit iadc code 517 ... :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 ...