A great tool for practicing your quick draw skills, Lyman A-Zoom Revolver Precision Snap Caps are great for safe cowboy, sixgun, and lever action dry-firing practice drills. A-Zoom snap caps are suitable for single action, lever action or double action revolvers. 6 pack. Manufacturer model #: 16118. Perfect for safe, dry-firing revolver practice Suitable for single action, lever action, or double action revolvers