McJ Tools Reloading M2HSS Chamfer Deburr Tool Kit can be used by hand drill or attached to DBT base. Tool Kit handles all cartridge cases from .17 to .45 caliber. Most new cases have dents, irregularities and burrs at the mouth of the case. These cases should be sized, expanded and chamfered/deburred. To prepare for accurate bullet seating, sharp corners that result from trimming a case can be removed quickly and accurately by using its precision-ground and hardened cutting edges.