Features: Dual Spine Weight Forward Technology - Patented 2 spine arrow shaft with heavier front for tighter groups & better penetration plus reduces oscillation by 50% & TWICE the ACCURACY. BuffTuff - Patented outer layer construction on the front 2/3 that provides the world&&';;s toughest and quietest carbon arrow finish plus makes it easier to remove from targets. Laser Match Set - Pack sets are sorted & matched by spine and weight for best-in-class consistency. Spine sorting tolerance +/- .0025" & Weight sorting tolerance +/- 1.0 grains +/- .003 Real Straightness - Laser checked for straightness to remarkable 1/10,000 of an inch, our straightness standards are set as a max not an average like competitors. Universal Nock System - includes inserted moon nocks plus C-Nocks compatible with crossbows that use Capture or Alpha Nocks. 3" Fusion Vanes