The chamfer tool (catalog #90109) can be used to remove the crimp from the primer pocket of military cases. It can be power driven with an attachment intended for the Dremel Moto-tool. Look for the sanding drum attachment, which is a small rubber cylinder attached to an arbor. There is a screw in the end which when turned causes the rubber cylinder to expand. This can be inserted into our Chamfer tool and expanded, so you can chuck it into a slow speed drill.