The Mini Red cords fit ChiaoGoo's Twist Mini interchangeable circular knitting needles in sizes 000 US, 00 US, 0 US, 1 US, and 1.5 US. You are buying just the cord. Each cord comes with a tightening key. See the Needles and Notions section to buy coordinating tips.
TWIST cables are memory-free! They consist of a multi-strand, steel cable coated with red nylon. This 14″ (35 cm) length will make a 24″ (60 cm) circular when 5″ (13 cm) tips are attached, 22" will make 32" circulars, 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.