Easton RX-7 420 spine Carbon Arrow Shafts - 12 Pack - Easton's RX-7 series 7178 aluminum arrow shafts incorporate a precision rear taper, effectively letting recurve shooters shoot a bigger arrow at a lower bow weight, and also with less point weight, while maintaining maximum shaft diameter for higher scoring potential. Dynamically similar to one full diameter weaker. Rear micro-taper enhances finger release forgiveness and allows use of more forgiving, lighter point weights. Thicker front wall provides greater durability in tough target materials. Shafts include Super Uni Bushings, all other components sold separately.