Pistol Chamber Hone Compatible Bore Diameter - Maximum 3/8 in Compatible Firearm Caliber .357 Mag/.38 Stem Diameter 0.14 in Abrasive Length 1 5/8 in Overall Length 3 in Abrasive Material Silicon Carbide Grit 400 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 Coarse Stem Marking Color Not Applicable