Very good performance well drilling bit, high downhole speed and long working life Payment terms: ... /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 ... (6”),155.5mm(6 1/8”),158.7mm(6 1/4”), 165.1mm(6 1/2”)190.5mm(7 1/2”),193.6mm(7 ... /8”),295.3mm(11 5/8”)311.1mm(12 1/4”),346.0mm (13 5/8”),349.2mm(13 3 ... ,627,637,737512,522,532,612,622,632,732Tricone bit 4 5/8"IADC537G