Killer Instinct’s Hypr-V Lighted Crossbow Bolts are engineered for precision and performance, now featuring the advanced V-Track nock for improved string contact and reduced serving wear. Designed specifically for Killer Instinct's narrow axle-to-axle crossbows, these 20-inch bolts are built with a straightness tolerance of .003 inch and an inner diameter of .300 inch, ensuring consistent accuracy shot after shot. Each bolt has a total grain weight of 390 grains with a 100-grain point and comes equipped with integrated lighted nocks for better visibility in low light.