... 3.IADC:116,217,437,517,537,617 4.oil,water well Mill tooth Tricone ROCK Bit -TCI Tricone Bit Specifications: Bit ... .5MM.we can make the diamater size of the rock bits as cutomers request.the diamater size show in execl Pls ... see other details: Available IADC code of rock bits Milled tooth:116,117,126,127,136,137,216,217 ...