This is Pachmayr A-Zoom Snap Caps 22 Rimfire Action Proving Dummy Rounds. These .22 Rimfire dummy rounds are not dry fire snap caps, but rather precisely dimensioned, functional dummies; A-Zoom Training Rounds are CNC machined from solid aluminum and hard anodized. A-Zoom .22 Rimfire dummies are widely used for hunter education and teaching safe firearms handling. Gunsmiths rely on them, too. Training rounds are the same size as actual ammunition. A-Zoom 22 Training Rounds load in a magazine just like real ammo. Teach Safe Loading and Unloading. This package contains 6 Dummy Rounds.