13 3/4 TCI tricone bit IADC417 1.sizes range from3 7/ ... all IADC code 3.reliable quality and best price 13 3/4 TCI tricone bit IADC417 1) I am Sarah Li ... 617G, 627G, 637G9 1/2241.3437G, 517G, 537G, 547G, 617G9 5/8244.5437G, 517G, 537G, 547G, 617G9 7/8250.8437G, 517G ... Conical teeth 2) X-chisel teeth 3)K- wide teeth 4)G- Gague protectionMaterialAlloy steel ,carbidePackingWooden case or steel casePayment ...