... 617 4.reasonable price,excellent quality 5.ISO,SGS approved Rock Bit1.Type:TCI & Milled tooth2.Available size:3. ... Available IADC code of rock bits Milled tooth:116,117,126,127,136,137,216 ... Products in details:6.Payment terms:T/T & L/C acceptable7.SGS approved,custom-madeProfessional factory, sample can be ... Feng86-18730702717. 12 1/4'' TCI ,water well rock roller