... 120mm,127mm(5”)130.1mm(5 1/8”),133.3mm(5 1/4”),139.7mm(5 1/2”),142.8mm(5 5/8”),149.2mm(5 7/ ... 8”)269.8(10 5/8”),295.3(11 5/8”)311.1(12 1/4”),346.0 (13 5/8”),349.2( ... 13 3/4”)374.6(14 3/4”)381(15”),393. ... 7(15 1/2”),406.4(16”)444.5(17 1/2”),508(20”), ... 558(22”),609.6(24”)660.4(26”) Steel tooth(IADC ...