Resilient, flexible cords lay flat, with no kink or twist - easy to store. Smooth join - enables stitches to slide around needles effortlessly. Long threaded screw-in “join” insures that cord and needles stay connected while the tightening hole provided in the metal join offers extra secure tightening. Specially designed “key” facilitates effortless tightening and end caps easily fit on cord and keeps knitting safe.