The Cuesoul Tero AK7 Aluminum Dart Shafts features a patented, cutting-edge design that combines a built-in spring-loaded telescopic system with a smooth, wobble-free rotating mechanismengineered to work seamlessly with AK4 flights. Ideal for both soft tip and steel tip darts, this dual-action system helps darts group tightly by rotating on impact, reducing flight damage and minimizing deflections when hitting previously thrown darts. The result is improved flight stability, enhanced durability, and fewer interruptions from flights popping off during your game.