Carbon Express Predator 600 spine Carbon Arrows - 12 Pack - The Predator series is designed to offer outstanding strength, durability, and high-powered performance for the archer searching for the performance and affordability in their arrows. The Predator is a reliable, and affordable carbon arrow with spine sizes to fit archers of all sizes. Laser Match Set - Pack sets are sorted & matched by spine and weight for best-in-class consistency. Spine sorting tolerance +/- .0025in & Weight sorting tolerance +/- 2.0 grains +/- .004in 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. NRG 2in Vanes