The weight of the HYPR™ SWAT™ Crossbow Bolt delivers maximum penetration, hard hitting kinetic energy and devastating knock-down power. Advanced carbon construction creates spine consistency for greater accuracy and maximum consistency. 22” length straight fletched with Q2i Fusion® X-II 3.0“ Vanes, pre-installed nocks, 400 grains total weight, 0.346” diameter, 6 per pack. Designed for use with Killer Instinct® SWAT™ XP Crossbow.