TWIST cables are memory-free! They consist of a multi-strand, steel cable coated with red nylon. 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. SPIN tips will work with TWIST cables. These cables fit ChiaoGoo small needle sizes from 2.75 mm (US2) – 5.0 mm (US8).