These [L] large interchangeable cables are for sizes US-9 (5.5 mm) to US-15 (10 mm) tips. The cables come in several sizes - select the size you need from the drop down. SPIN cables allow your tips to swivel freely! They are made of a pliable clear nylon. Also available in small [S] sizes. 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 and vice versa.