Victory Archery Inserts Backweight 20 Grain 12 Pack is designed for archers looking to customize their arrow weight. These backweights are easy to install and help improve arrow dynamics. Each pack includes 12 inserts, allowing you to modify multiple arrows at a time, ensuring optimal performance in your archery activities. These screw-in weights allow the shooter to customize their front-of-center (FOC). The weights are compatible with Victory Xtdrsions Rip, Rip Tko, Rip XV, and Carbon Trad shafts, making them a versatile choice for various arrow configurations.