... -sales service 4.adequate stocks,fast delivery 5.IADC 447 12 1/2" IADC 447 Kingdream rock bit international HAS series ... (10 5/8”),295.3(11 5/8”)311.1(12 1/4”),346.0 (13 5/8”),349.2(13 ... (22”),609.6(24”)660.4(26”) Steel tooth(IADC)111, 121,131117,124,126,127,136,137211,311216,217, 227TCI ... Terms:T/T, L/C at sight, western unionProducts show 12 1/2" IADC 447 Kingdream rock bit international HAS series ...