... .Dia:3 1/2''--26'' 2.Type:Milled tooth & TCI 3.IADC:116,217,437,517,537,617 4.oil,water well Mill tooth ... bed,etcHardfaced gage and all tooth surfaces, and a row of trimmers is added between gage row and heel row,0 ... ,sandstone and limestone,etcHardfaced gage and all tooth surfaces.0.25~0.70200~80 TCI Specifications Bit typeIADC CodeApplicable formationMain characteristics ...