Mill tooth tricone rock bit 1.Dia:3 1/2''--26'' 2.Type:Milled tooth & TCI 3.IADC:116,217,437,517, ... limestone and sandstone,etc.Large radius scoop compacts in inner row,wedge compacts in outer row and inequable spaced compacts arrangement0.50 ... ,dolomite and sandstone,etc.Conical compacts in inner row,spherical compacts in outer row.0.50~1.10200~40THJ737G737Hard formation with high abrasiveness ...