... after-sales service 4.adequate stocks,fast delivery 5.IADC 417 IADC 417 10 5/8" Kingdream carbide cutting tool HAT series for oil ... /8”),215.9mm(8 1/2”),222.2mm8 3/4”) 241.3(9 1/2”),244.4(9 5/8”),250.8(9 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 ...