Dry Fire Without Damaging Your Firearm
Snap caps are great for dry fire practice because they let you concentrate on keeping the firearm steady during the trigger pull, which helps eliminate flinch when using live ammo. Solid aluminum Rimfire snap caps protect the breech face and will last for hundreds of "shots".
Big Book Catalog, Issue:68, Page:406
SPECS: Aluminum body, fits .22 LR rifles and pistols.