... abrasive formations such as limestone, dolomite,chert and hard sandstone,etc.Large radius conical compacts in ... inner row,spherical compacts in crest and outer row,and inequable spaced compacts arrangement.0.50~ ... .0.50~1.20200~401.Type:TCI -tungsten carbide insert and Milled tooth2.Available size: 85.5MM,88 ... code of rock bits Milled tooth:116,117,126,127,136,137,216,217.TCI-tungsten carbide insert:417, ...