Knitter's Pride Interchangeable Colored Cables are resilient, flexible cords that lay flat, with no kink or twist – easy to store. They have a smooth join, enabling stitches to slide around needles effortlessly. A long, threaded screw-in “join” insures that cord and needles stay connected. There's a tightening hole in the metal join for extra secure tightening, to be used with a specially designed “key” that facilitates effortless tightening. End caps easily fit on the cords and keeps your knitting safe. You will receive one cord, two end caps & one cord key with each set. Please note that the cable lengths sold below reflect the final length of circular needle (i.e. the cable plus the two needle tips), and not the length of the cable itself. The 16" Cable when combined with the 4.5" tips creates an 18.25" long circular needle. The 16" Cable when combined with the shorter Special Interchangeable Tips creates a 16" long circular needle.