Flexible Cylinder Hone, Compatible Bore Diameter – Maximum 4 5/8 in, Compatible Firearm Caliber Not Applicable, Stem Diameter 0.31 in, Abrasive Length 4 in, Overall Length 13 1/2 in, Abrasive Material Silicon Carbide, Grit 120, Compatible Tool Type CNC Machine, Drill, Drill Press, Operating Speed – Maximum 600 RPM, Primary Material Application Cast Iron, Steel, Stainless Steel, End Marking Color Not Applicable, Grade Coarse, Stem Marking Color Not Applicable