Lykke Interchangeable Needle Sets come in 2 formats:
3.5" needle tips in U.S. 3 to 10.5. This set works best for accessories like hats, cowls and other smaller items. Cords are included to make 16", 20", and 24" cables.
5" needle tips in U.S. 4 - 17. This set is great for shawls, sweaters and all your larger projects. Cords are included to make 24", 32" and 40" cables,
Both sizes come with all the connectors, keys and stoppers you need.