1.Dia:3 1/2''--60'' hole reamer bit 2.Type:Milled tooth & TCI 3.IADC:116,517,537, ... 617 hole reamer bit size to 50inch Rock Bit- hole reamer bit 1.Type:TCI & Milled tooth size from ... to 60'' or 70inch2.Available size:3.Available IADC code of rock bits Milled tooth:116,117,126,127,136,137 ...