... :116,517,537,617 hole reamer bit size to 50inch Rock Bit- hole reamer bit 1.Type:TCI & Milled tooth size ... 60'' or 70inch2.Available size:3.Available IADC code of rock bits Milled tooth:116,117,126,127,136,137,216,217 ... shows in photos:4.IADC code modalityCertificate: ISO,SGS5.Package and shippment6.Payment terms:T/T & L/C acceptable7.SGS approved ...