Product DescriptionPro-Shot 12 Gauge Snap Caps combine brass heads with cotton chamber mops to help protect your shotgun&&';;s chamber from rust during storage and handling. Each snap cap features a replaceable mop and a spring-loaded internal pin to cushion the firing pin during dry-fire practice. The #5/16-27 threaded mop allows easy replacement or maintenance, and a few drops of your preferred oil-such as 1 Step CLP/Zero Friction-can be added for enhanced corrosion protection. Made in the USA.Product Highlights Brass snap caps with cotton mops for chamber cleaning and rust protection Spring-loaded internal pin helps cushion the firing pin for safe dry-fire practice Replaceable #5/16-27 threaded mops for long-term use and easy maintenance Optimized for 12 Gauge shotguns; suitable for over/under and side-by-side models Use with a light oil for added corrosion resistance in the chamber Specs Product Type: Shotgun Snap Caps Gauge: 12 Gauge Firearm Type: Shotgun Mop Material: Cotton Head Material: Brass Thread Pattern: #5/16-27 Quantity: 2 per pack Country of Manufacture: USA UPC: 709779600618 Manufacturer Part Number: 12SC Brand: Pro-Shot Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&&';;s manufacturer.