TWIST cables are memory-free! They consist of a multi-strand, steel cable coated with red nylon. The listed length is the actual length of the cable will make a circular that is 10" longer when 5"(13 cm) tips are attached. 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 MINI cables are for use with tip sizes US000(1.5 mm) to US1½(2.5 mm)