... -hard drilling information 6) Bit size:8 1/2"IADC code:5372,products details 3,Packingor steel box4,we can ... 558(22”),609.6(24”)660.4(26”) Steel tooth(IADC)111, 121,131117,124,126,127,136,137 211, ... 311216,217, 227TCI(IADC)415,435, 417,437515,525,535,545, 517,527, ... you inquiry1)the size of the tricone bit.2)the IADC tooth model,like 537G3)plz tell the drilling information ...