... history Milled Tooth Rock Roller Bits: 7 7/8 to 14 1/2 ModelTCI BIT, STEEL TOOTH BITIADC ... unionDelivery termsBy sea or by airDelivery timeWithin 3 to 7 daysMarketCanada, USA,Middle east ,Africa,Europe ... :we specializes in manufacturing:Tricone bits,steel tooth bit,milled tooth , rock roller bit,tricone bit,tungsten ... /8294-53980-40Contact information Milled Tooth Rock Roller Bits: 7 7/8 to 14 1/2