GBD312240AO FLEX-HONE, 3.500 (89mm) bore, 13.5 OAL, 240 Grit, Aluminum Oxide (AO)
31 in, Abrasive Length 5 in, Overall Length 13 1/2 in, Abrasive Material Aluminum Oxide, Grit 240, Operating Speed - Maximum 900 RPM, Primary Material Application Stainless Steel, Compatible Bore Diameter - Minimum 3 in, End Marking Color Blue, Stem Marking Color Black.Flexible Cylinder Hone, Compatible Bore Diameter - Maximum 3 1/2 in, Compatible Firearm Caliber Not Applicable, Stem Diameter 0.