Shotgun Chamber Hone Compatible Bore Diameter - Maximum 3/4 in Compatible Firearm Caliber 16 Gauge Stem Diameter 0.19 in Abrasive Length 2 1/2 in Overall Length 12 in Abrasive Material Aluminum Oxide Grit 800 Compatible Tool Type CNC Machine Drill Drill Press Compatible Bore Diameter - Minimum Not Applicable End Marking Color Not Applicable Grade Fine Stem Marking Color Not Applicable