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. 38 Special. Thousands of dry fires without damage Functions just like real ammo - without the noise Hard coat anodized aluminum construction Training, storage, testing, practice Precision CNC machined