Jag 50 Cal Muzzleloader Brass For use with these calibers: Handguns: .50; Rifles: .50 A metal jag, draped with a proper sized patch, completely covers the entire bore for efficient, thorough cleaning For ease of use, the unique KleenBore design incorporates a special barbed point at the tip of the jag to secure the cleaning patch and prevent solvent soaked patches from falling off