... in outer row.0.50~1.20200~401.Type:TCI -tungsten carbide insert and Milled tooth2.Available size: 85.5MM,88.9MM ... .5MM.we can make the diamater size of the rock bits as cutomers request.the diamater size show in execl Pls ... IADC code of rock bits Milled tooth:116,117,126,127,136,137,216,217.TCI-tungsten carbide insert:417,437,517,527 ...