... (3 7/8”), 114mm,118mm(4 5/8”),120mm(4 3/4”),127mm(5”)133.3mm(5 1/4”),139.7mm(5 1/2”),142.8mm(5 5/8”),149.2mm(5 7/8”)152 ... .4mm(6”),155.5mm(6 1/8 ... 4mm(9 5/8”),250.8mm(9 7/8”)269.8mm(10 5/8”),295.3mm(11 5/8”)311.1mm(12 1/4”),346.0mm (13 5/8”),349 ... ,,617,627,637,737512,522,532,612,622,632,7323 cone rotary rock bit 4 5/8"IADC537G