The Carbon Express 52134 Maxima BlueStreak Cross Bolt features a premium 100-percent carbon construction for ultimate speed and flatter trajectory. This cross bolt features Dual Spine Weight Forward technology, BuffTuff exterior and a precision milled insert for added strength. The 52134 comes factory fletched with Norway R2 Vanes. Item Specifications: 20-Inch Bolt, Weight: 380-Grain. To gain the advantage in the field, you need the best equipment, which is why so many hunters, competitors and enthusiasts insist on the Carbon Express brand. It's a simple fact: Arrows with consistent spines ensure tighter groupings downrange and make consistently better, more accurate shooters. Carbon Express uses innovative technology and the highest grade of carbon fiber to produce the most consistent arrow spines in the industry. Unlike other manufactures, Carbon Express laser sorts its premium hunting shafts to ensure all the arrows in each set have the same spine tolerance and provides the straightness tolerance that are maximum measurements, not merely averages. If you have a passion to shoot better, Carbon Express will continue to develop unparalleled advancements in accuracy, recovery and performance to provide the public with the finest arrows, broad heads, crossbows and cross bolts, as well as archery and cross bolt accessories.