... :hard alloy cutting tooth5) Apply to soft-medium,medium-hard drilling information 6) Bit size:8 1/2"IADC code:5372,products details ... ”),161.9mm(6 3/8”),165.1mm(6 1/2”)190.5mm(7 1/2”),193.6mm(7 5/8”),200.0mm(7 7 ... 7/8”)269.8(10 5/8”),295.3(11 5/8”)311.1(12 1/4”),346.0 (13 5/8”),349 ... ,532,612,622,632,7326,Payment termsT/T and L/C are acceptable.(30% advanced payment after sign the contranct ,then ...