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 Silicon Carbide, Grit 800, 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 Blue, Stem Marking Color Not Applicable