1,tci tricone bit.tci rock bit 2,certified by API 3,best price 4,wide size code 5,delivery on time 1,tci tricone bit.tci rock bit2,certified by API3,best price4,wide size code5,delivery on timeSize and types availableSize: Common sizes, 6.6-1/2, 7-7/8, 9-7/8, 10-5/8, 12-1/4Various sizes also can be manufactured by the clients order.Types: IADC Code, 127, 137,216,337,437,517,537,547,617,637,737 ...