Rifle Chamber Hone Compatible Bore Diameter - Maximum 5/16 in Compatible Firearm Caliber .30-06 Stem Diameter 0.17 in Abrasive Length 2 1/2 in Overall Length 12 in Abrasive Material Silicon Carbide Grit 800 Compatible Tool Type CNC Machine Drill Drill Press Operating Speed - Maximum 1 200 RPM Primary Material Application Stainless Steel Compatible Bore Diameter - Minimum Not Applicable End Marking Color Not Applicable Grade Fine Stem Marking Color Not Applicable