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. MINI for sizes US 000 (1.5 mm) to US 1.5 (2.5 mm) SMALL for sizes US 2 (2.75 mm) to US 8 (5 mm) LARGE for sizes US 9 (5.5 mm) to US 15 (10 mm)8" (20 cm) length will make a 16" (40 cm) circular when 4" (10 cm) tips are attached. 14" (35 cm) length will make a 24" (60 cm) circular when 5" (13 cm) tips are attached. 22" (55 cm) length will make a 32" (80 cm) circular when 5" (13 cm) tips are attached. 30" (75 cm) length will make a 32" (100 cm) circular when 5" (13 cm) tips are attached.