BC1240AO FLEX-HONE, 0.500 (12.7mm) bore, 8 OAL, 40 Grit, Aluminum Oxide (AO)
Flexible Cylinder Hone, Compatible Bore Diameter - Maximum 1/2 in, Compatible Firearm Caliber Not Applicable, Stem Diameter 0.17 in, Abrasive Length 2 1/2 in, Overall Length 8 in, Abrasive Material Aluminum Oxide, Grit 40, Compatible Tool Type Brake Cylinder, Wheel Cylinder, Operating Speed - Maximum 1,000 RPM, Primary Material Application Stainless Steel, Compatible Bore Diameter - Minimum 1/2 in, End Marking Color Purple, Stem Marking Color Black.