Please note the addi Natura Click Tip Packs only include additional tips, additional cords are sold separately. The Addi Natura Click system provides 8 different sizes of Addi bamboo tips (US 4, 5, 6, 7, 8, 9, 10 and 11)), three different lengths of our new, extremely pliable blue cord (24 , 32 and 40 ), and one connector piece which helps to either store stitches or combine your cords. The Click tips require no tools to change; simply insert the cord deep into the tip, twist and release. The tips will remain secure until you change them, thanks to the Click"s revolutionary locking mechanism!