Have the right size needle at your fingertips when you need it. The blue extra flexible, nylon-coated, memory-free cords offer a lifetime of knitting delight. Cables are constructed from multi-stranded steel for ultimate durability. The cables offer smooth knitting with secure connections. Each cable has lifeline holes & comes with a tightening key. Please note that ChiaoGoo cable sizes coordinate with the following needle size ranges, so please double check to make sure you select the correct size. Mini (fits size US 000-2 (1.5-2.75mm) needles Small (fits size US 2.5-8 (3-5mm) needles Large (fits size US 9-15 (5.5-10mm) needles