These cords work with any of the Knitters Pride interchangeable knitting needles AND crochet hooks, including Dreamz and Karbonz. The length indicates the full length of the needle once tips are attached rather than the length of the cable itself.NB: The 16″ cords are only recommended for use with 4″ special interchangeable tips, NOT with the standard 4.5″ tips. I carry the cords in case you already have the tips but I don’t carry the 4″ tips. If you’re looking for a 16″ needle, check out the selection of 16″ fixed circular needles instead.