Save money by molding your own shotgun slugs. The single cavity slug mold features an exclusive drive key to rotate the slug in rifled shotgun barrels. Twelve gauge use only. Mold body is crafted from aluminum, sprue cutter is steel and mold comes with wooden handles. Made in USA. Available: 7/8 oz.; 1 oz. WARNING: This product contains lead, a chemical known to the state of California to cause cancer and birth defects and other reproductive harm. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Molds.