Dead Ringer Nutralyzer Bolt 5-Pack features five 20" High-Strength Bolts that were created to be compatible with all broadheads. Nutralyzer Crossbow Bolts are crafted with a high-strength pure carbon construction so they can withstand hard hits. Featuring a pre-installed nocking system, these arrows can shoot swiftly and accurately. Arrow Specifications: 307.08 Grain, 20" Length,5/16" Insert System, Includes Vanes and nocks, Comes in 5-pack. Dead Ringer, Deadly accurate products made by passionate and fanatical outdoors enthusiasts