... (extra features)Button bit,saw teeth1) Y-Conical teeth 2) X-chisel teeth3)K- wide teeth4)G- Gague protectionMaterialAlloy ... 7 daysMarketCanada, USA, Middle east ,Africa, EuropeApplicationPetroleum & gas ,water well ,mining and tectonic industries ,oil field, construction, geothermal, directional boring ... ring provides adequate sealing for bearing durability. 3 1/2"-26" Kingdream water well reamer bit