Dry fire .22 LR Rimfire safely without chamber damage. Packed in handy 24 packs, these Pachmayr snap caps are precisely molded from a resilient polymer for many safe, damage-free hammer drops. After extensive experimentation and testing, these tough, polymer snap caps are proven to deliver long life and many hammer drops. These snap caps can withstand up to 5-times as many hammer drops as the other “disposable” rimfire snap caps.