The Lyman Flash Hole Uniforming Tool is perfect for reloaders looking to increase ignition consistency and reduce variation from case to case. When brass is manufactured there are burrs that are sometimes created when the flash hole is tapped out. This tool quickly removes that burr creating more consistent ignition. This process only needs to be done once for the complete life of a piece of brass. This steel tool includes a cutter, shaft, shoulder stop and ergonomic plastic handle. It also features an adjustable stop collar which allows use with any length case from 22 to 45 caliber. The Flash Hole Uniformer is not a standard deburring tool, as it deburs flash holes only and no other parts of the case. Notes: Will not fit case necks under 22 caliber