The A-ZOOM Action Proving Dummy Round Snap Cap Blue Value Pack is for safety training, function testing or safely decocking without damaging the firing pin. A-Zoom training rounds are much more than conventional snap- caps. They are precision CNC machined from solid aluminum to precise cartridge dimensions, then hard anodized for ultra-smooth functioning and long life.FeaturesFor safety training, function testing or safely decocking without damaging the firing pinPrecision CNC machined from solid aluminum to precise cartridge dimensionsHard anodized for ultra-smooth functioning and long life