Its micro-diameter 4mm (.165") shaft reduces drag dramatically, resulting in exceptional speed and penetration. Super-sorted for unmatched consistency, the FOCUS arrow delivers arrow-to-arrow performance that redefines accuracy. Precise spine, straightness, and weight tolerances guarantee repeatable flight in every arrow, while the optimized weight maximizes kinetic energy. Key Features: Super-Sorted: Each Black Eagle arrow is made with extremely tight tolerances and undergoes rigorous quality control measures to ensure consistent spine, straightness, and weight, resulting in exceptional arrow-to-arrow results. Speed: Optimized for the perfect balance of speed and durability, Black Eagle arrows deliver reliable arrow-on-target performance. Durable Construction: Built with the highest quality carbon in their class to withstand the rigors of hunting and target practice, Black Eagle arrows offer exceptional durability. Spine Indexed: For an additional level of care, each Black Eagle arrow is precisely spine indexed. Focus Specs: .001 Straightness ± 1 Grain Weight Tolerance