The Red Lace Twist cord fits all ChiaoGoo interchangeable needles from sizes US 2 - 8.
TWIST cables consist of a multi-strand, steel cable coated with red nylon. The 14″ length can make a 24" circular knitting needle when used with 5" tips, the 22" can make a 32" needle, etc.
Lifeline holes can be found at each end of these cables. Insert the T-shaped tightening key into the lifeline hole to assist with securing your tip/cable connection.