Ensure your shotgun's longevity and safety with these 20 Gauge Wool Snap Caps. Designed to protect your firearm during dry firing they feature a brass base and a spring-loaded primer plunger to safeguard the firing pin. The wool chamber mop can be treated with your preferred gun oil effectively preventing rust in the chambers while in storage. By avoiding the strain of leaving guns cocked these snap caps play a crucial role in maintaining your shotgun's optimal condition. Perfect for conscientious gun owners this 2-pack offers a practical solution for firearm upkeep.