The Killer Instinct HYPR-V Crossbow Bolts are designed for maximum penetration and devastating knock-down power. These bolts feature advanced carbon construction, ensuring spine consistency for greater accuracy and exceptional reliability. With a precision sorted straightness tolerance of +/- 0.003", you can expect consistent performance from shot to shot. The heavy weight of these bolts delivers kinetic energy, making them ideal for taking down big game. On sale now, these affordable crossbow bolts are available in packs of six. Fast shipping ensures you'll be ready for your next hunt in no time.Product Features and Specifications: LENGTH: 20" STRAIGHTNESS TOLERANCE: .003" INNER DIAMETER: .300" OUTER DIAMETER: .346" GRAIN WEIGHT TOLERANCE: +/- 1.0