For safety training, function testing or safely decocking without damaging the firing pin, A-Zoom training rounds are much more than conventional snap-caps. Safely teach new shooters how to load magazines, safety check firearms, and Fix malfunctions with this inert ammo substitute. A-Zoom snap caps are precision CNC machined from solid aluminum to precise cartridge dimensions, then hard anodized for ultra-smooth functioning and long life. A-Zoom remarkably durable 'dead cap' primers are proven to withstand over 3, 000 dry fires while protecting the firing pin.