Fit Flight Carbon Spinning Dart Shafts - X-Long #8 (42.5mm) BlackLightweight, strong, and rigid COSMO DARTS has succeeded in creating the lightweight shafts with high stiffness and strength that is comprised of reinforced plastic resin and high strength carbon fibers. These shafts combine both the performance of lightweight plastic and the high durability of metal. Includes: 4 2ba Carbon Shafts 8 O Rings It's now easier to tell between locked and spinning Spinning shafts have a rounded top and Locked shafts have a