SPIN cables allow your tips to swivel freely! They are made of a pliable, clear nylon. This 30? (75 cm) length will make a 40? (100 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. Available in both small [S] and large [L], please make sure you are selecting the cable size that will work with your tip size.