Rifle Chamber Hone, Compatible Bore Diameter – Maximum Not Applicable, Compatible Firearm Caliber .308, Stem Diameter 0.14 in, Abrasive Length 2 in, Overall Length 12 in, Abrasive Material Silicon Carbide, Grit 800, Operating Speed – Maximum 1,200 RPM, Primary Material Application Stainless Steel, Compatible Bore Diameter – Minimum Not Applicable, End Marking Color Blue, Grade Fine, Stem Marking Color Not Applicable