1,tci tricone bit.tci rock bit 2,certified by API 3,best price 4,wide size ... time The main products we manufactured are bellows 1, tricone bit include the steel tooth and tung , we can also produce ... and any other series of the bits .2, PDC bit include the TSP bit, natural diamond bit and impregnate bit.3, the number of blade ... 2”, 12-1/4”, 6”, 17-1/2”,4, the Rotary speed is form 10 ~300 r/min.We have the ...