A-Zoom Snap Cap training rounds are designed for safety training, function testing or safely decocking without damaging the firing pin. They are widely used for hunter education, gunsmith function testing and for teaching safe firearms handling. The Snap Caps 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 durable Dead Cap proven to withstand over three thousand dry fires while protecting the firing pin. A-Zoom Snap Caps last over 30 times longer than conventional plastic training rounds. This package contains (5) .357 Mag A-Zoom Snap Caps. Made in the USA by Lyman Products.