Dry firing a rimfire pistol may appear harmless, but it can cause the formation of a small burr on the breech face. Over time, this burr can expand and deepen, resulting in feeding and reliability issues. The TANDEMKROSS ChamberMade ironing swage offers a solution to repair the damage caused by dry firing. This convenient tool can be operated using a 1/4 inches hex drive screwdriver from the chamber side or by attaching it to a cleaning rod inserted from the muzzle. To repair any .22 Cal chambers damaged by firing pin impact Eliminates a prevalent cause of feeding and extraction malfunctions Corrosion-resistant and heat-treated for extended durability