... ,517,537,617 4.ISO,SGS approved 5.hole reamer bit hole reamer bit1.Type:TCI & Milled tooth2.Available size:3.Available IADC code of rock ... . TCI:417,437,517,527,537,547,617,637,737.Products details shows in photos:4.IADC code modalityCertificate: ISO,SGS5.Package and shippment6 ... 24 hours.Choose me,do not hestitate:Welcome to contact with us if you have any problems.we are looking forward ...