Resilient, flexible cords lay flat, with no kink or twist, making them easy to store. Smooth join –enables stitches to slide around needles effortless. Long threaded screw-in “join” insures that cord and needles stay connected. Tightening hole provided in the metal join for extra secure tightening, using the specially designed “key” facilitates effortless tightening. End caps easily fit on cord and keeps knitting safe. Each Unit contains One Cord, Two-End Caps & One Cord Key.