Don't guess. Be certain of the spine arrow you need with this Victory Carbon Trad Shaft Test Kit! Comes with one each of 650, 550, 450, and 350 spine Victory Carbon Trad Shafts. Victory Archery is one of the innovators in micro-diameter carbon shafting. The Carbon Trad line adds Victory's exclusive, ground-breaking ICE™ Nano Ceramic coating. Victory Carbon Trad arrow shafts feature a micro-diameter carbon core with an infused natural, woven linen fiber outer layer for the look and feel of natural wood, but with the durability, accuracy, and precision of carbon. The ICE™ nano ceramic coating is the slickest arrow coating available for improved penetration and easier target removal. The SHOK® Outsert Technology features a 7075 hard adonized stainless steel outsert with standard 8/32 thread and 5/16" diameter. This adds penetrating power to an arrow shaft that's already at 11 on the deadly scale! Installed with Bohning A nock (7 gr) and includes stainless steel outserts (80 gr, adds ½" to overall length and feature a built-in reinforcement collar). Straightness: ±.006". Recommended field point: 5/16". Comes with one each (spine/GPI): 650/10.1, 550/10.5, 450/10.7, and 350/11.2. Have 3Rivers Archery cut your shafting to length and install your inserts to make it easier for you to get right to shooting when you get your order. See Printable Arrow Selection Chart PDF