Karbonz needles are made from high-tech carbon fiber with tips in nickel plated brass. The light bodied carbon fiber & sharp brass tips is guaranteed to provide an unparalleled knitting experience. Ideal for all types of yarns and for every project. Customizable cord length. Karbonz interchangeable needles are excellent for socks, and projects with high stitch counts. The Special tips are smaller in length (approximately (3.5") than the normal interchangeable tips (4.5"). The Special tips are meant to be used with 16" cords to knit small projects.