Flexible Cylinder Hone, Compatible Bore Diameter – Maximum 4 mm, Compatible Firearm Caliber Not Applicable, Stem Diameter 0.06 in, Abrasive Length 3/4 in, Overall Length 6 in, Abrasive Material Silicon Carbide, Grit 240, Compatible Tool Type CNC Machine, Drill, Drill Press, Operating Speed – Maximum 1,200 RPM, Primary Material Application Cast Iron, Steel, Stainless Steel, End Marking Color Not Applicable, Grade Fine, Stem Marking Color Not Applicable