The Black Eagle F. O.C. O.S Weight Adjustment Tool 1761 is a precision-engineered tool designed to fine-tune the weight of your arrows. Made to fit Instinct, X-Impact, and Deep Impact arrows, this tool features a hardened hex head and carbon-powered construction for lightweight durability. Ideal for making those fine adjustments to maximize the F. O.C. O.S and increase downrange accuracy, this tool is a must-have for serious archers seeking to optimize their setup Black Eagle F. O.C. O.S Weight adjustment Tool 1761