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 ... ,527,537,547,617,637,737.Products details shows in photos:4.IADC code modalityCertificate: ISO,SGS5.Package and ... SGS approved,custom-madeProfessional factory, sample can be offer in 5 days.Rapid resonse to your needs:we will ...