About Chiaogoo Twist cords: 

• TWIST cables are memory-free! They consist of a multi-strand, steel cable coated with red nylon.
• The length listed is the actual cord length. To make a 16" needle, you should select an 8" cord plus 4" tips. 
• Be sure to select the right cord for your needle size: 
  • "Mini" cords fit tips from sizes US 000 to 1.5
  • "Small" cords fit tips from size US2.5 to US8.
  • "Large" cords fit tips sizes US9 to US15.

Note:

• Lifeline holes can be found at each end of the cables.
• Insert the T-shaped tightening key into the lifeline hole to assist with securing your tip/cable connection.
• TWIST cables will also work with SPIN Tips