... medium hard, very hard formationButton size (extra features)Button bit,saw teeth1) Y-Conical teeth 2) ... wide teeth4)G- Gague protectionMaterialAlloy steel ,carbidePackingWooden case or steel casePayment termsT/T,L/C, ... high projection. This cutting structure design, combined with maximum cone offset, results in high bit ... sealing for bearing durability. 3 1/2"-26" Kingdream water well reamer bit