Flexible Cylinder Hone, Compatible Bore Diameter - Maximum 6 in, Compatible Firearm Caliber Not Applicable, Stem Diameter 0.35 in, Abrasive Length 6 1/2 in, Overall Length 18 in, Abrasive Material Silicon Carbide, Grit 240, Compatible Tool Type Combustion Cylinder, Operating Speed - Maximum 600 RPM, Primary Material Application Steel, End Marking Color Orange, Grade Fine, Stem Length 11 1/2 in