... 5.IADC 417 IADC 417 10 5/8" Kingdream carbide cutting tool HAT series for oil well 1.Introduction ... near future. 2. TCI bits series 1.Tungsten carbide insert bit of high strength and toughness is to ... 152.4mm(6”),155.5mm(6 1/8”),158.7mm(6 1/4”),161.9mm(6 3/8”),165.1mm(6 1/2 ... 13 5/8”),349.2(13 3/4”)374.6(14 3/4”)381(15”),393.7(15 1/ ... .5(17 1/2”),508(20”),558(22”),609.6(24”)660.4(26”) Steel tooth(IADC)111, ...