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. Each round has A-Zoom's remarkably durable dead cap proven to withstand over three thousand dry fires while protecting the firing pin.CNC machined aluminum hard coat smooth anodized for durability and ease of extraction3,000+ dry fire life