The Supergrip Carbon Shafts from HARROWS are made of a unique carbon composition. Due to this composition, the Harrows Supergrip Carbon shafts are extra strong and last longer than the regular shafts. These shafts are available in 3 sizes MEDIUM: Length 45.00mm. IN BETWEEN: Length 40.00mm. SHORT: Length 35.00mm. You can easily replace shafts with any dart. They are available in different sizes to customize your dart in length and feel. Sizes: XX-Short/Micro, X-Short, Short, In Between, Medium & Long. In addition, they also consist of different materials: nylon, carbon, plastic, metal, etc. In short, you can adjust your dart to your own taste and feeling through different types of shafts.