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. K-360 - Patented outer layer construction on the front 2/3 that integrates 100% high modulus carbon weave for consistent spine strength and durability. 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. Launchpad Precision Nocks - Controlled arrow release and integrated shaft alignment for more consistent accuracy. Q2i Rapt-X 2" Vanes - 6pks fletched with either WHITE cock vane & 2 YELLOW vanes or GREY cock vane & 2 YELLOW vanes. Online orders are unable to choose color option