Small diameter carbon shaft from Victory. Key features: Designed for performance and penetration.. Durable, torque reducing, 100% carbon construction. Outer layer of carbon engineered to reduce twisting force on arrow launch, increasing accuracy and kinetic energy. Small diameter design to minimise wind-drift and tighten groups. Technical specifications: Material: Carbon Diameter: Small Diameter .166 Grains Per Inch: 8.4-9.5 (Spine dependent) Straightness Tolerance: ±0.006" Weight Tolerance: ±0.5 grains Available Spines: 300-400 Uncut length (approx): Included components: Bohning F Nock and Victory Shok Insert Optimal for: Long range accuracy