HA Kingdream TCI rock bit IADC517 Covers all IADC codes Long ... full model API and ISO suitable for soft formation API HA KingdreamTCI rock bit IADC517 1)Main structure 1.TCI tricone ... 1/2,22, 24,26M223,M322,M316,M222,M416,M122 HA Kingdream TCI rock bit IADC517