The Black Eagle F. O.C. O.S Brass Weights 30 Grain 1760 are precision-engineered to enhance the front-of-center (FOC) balance of your arrows. These screw-in brass weights are designed to fit the F. O.C. O.S retention posts, allowing for fine adjustments to achieve optimal arrow performance. Available in 10, 20, and 30 grains, these weights are stackable, enabling archers to customize their setup for maximum accuracy and penetration. The 3/32 Allen head ensures secure installation, and the durable brass construction guarantees long-lasting reliability. Ideal for both target shooting and hunting, these weights help archers achieve consistent shot placement and improved arrow flight Black Eagle F. O.C. O.S Brass Weights 30 Grain 1760