... API-ISO 2.good quality,low price 3.good after-sales service 4.adequate stocks,fast delivery 5.IADC 517 8 ... 60mm,65mm,76mm,93mm,95mm,98mm(3 7/8”),101.6mm,114mm,118mm,120mm,127mm(5”)130. ... 193.6mm(7 5/8”),200.0mm(7 7/8”)212.7mm(8 3/8”),215.9mm(8 1/2”),222. ... .4(9 5/8”),250.8(9 7/8”)269.8(10 5/8”),295.3(11 5/8”)311.1(12 ... T, L/C at sight, western unionProducts show 8 1/2" IADC 517 Kingdream hard rock drill ...