... the shirttail increases gauge holding capability and bearing life. 3.Bearing Structure of this type tci tricone rock bits : ... bit,saw teeth1) Y-Conical teeth 2) X-chisel teeth 3)K- wide teeth 4)G- Gague protectionMaterialAlloy steel ,carbidePackingWooden ... ,L/C,Western unionDelivery termsBy sea or by airDelivery timeWithin 3 to 7 daysMarketCanada, USA,Middle east ,Africa,EuropeApplicationpetroleum&gas ...