Flexible Cylinder Hone Compatible Bore Diameter - Maximum Not Applicable Compatible Firearm Caliber 1911 Stem Diameter 0.13 in Abrasive Length 1 5/8 in Overall Length 4 in Abrasive Material Silicon Carbide Grit 400 Operating Speed - Maximum 1 200 RPM Primary Material Application Stainless Steel Compatible Bore Diameter - Minimum Not Applicable End Marking Color Yellow Grade Coarse Stem Marking Color Not Applicable