Killer Instinct Lighted HYPR-V 20in Crossbow Bolts - 3 Pack - Killer Instinct’s premium Hypr Crossbow Bolt now features the new V-Track nock designed for ultimate accuracy on narrow axle to axle crossbows. The new V-Track improves nock to string contact, reduces center serving wear and works out of all Killer Instinct Crossbow Models. Free Arrow Cutting In Store FEATURES: High Viz Red Color Pre Installed Lighted V-Nock Length: 20in Straightness Tolerance: .003in Total Grain Weight: 390 Grains with 100gr Point Inner Diameter .300in