1,PDC bit,PDC drilling bit 2,certified by API 3,wide size code 4,best price 5,delivery on time The main products we manufactured are bellows 1, tricone bit include the steel tooth and tung , we can also produce the HA series ,HJ series ,FA series ,FJ series ,GA series ,GJ series and any other series of the bits .2, PDC bit include the TSP bit, natural diamond bit and impregnate bit.3, the number ...