SPIN cables allow your tips to swivel freely! They are made of a pliable, clear nylon. This 37? (95 cm) length will make a 47? (120 cm) circular 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. TWIST tips will work with SPIN cables. Please make sure you are selecting the cable size (Small or Large) that will work with the tips you have. If you have any questions, don't hesitate to ask!