Flexible Cylinder Hone, Compatible Bore Diameter – Maximum 2 3/4 in, Compatible Firearm Caliber Not Applicable, Stem Diameter 0.28 in, Abrasive Length 3 in, Overall Length 7 7/8 in, Abrasive Material Silicon Carbide, Grit 240, Compatible Tool Type Drill, Drill Press, Operating Speed – Maximum 700 RPM, Primary Material Application Steel, End Marking Color Orange, Grade Fine, Stem Length 4 7/8 in