Lace knitting is one of the most challenging types of knitting because of the difficulties involved when you have to unravel one or more rows to fix a problem. To keep your knitting from unraveling further than you want, knitters often insert a lifeline into their projects. Although it is possible to insert a lifeline using a needle and thread or dental floss, an easier technique can be accomplished using your HiyaHiya Interchangeable cable with a lifeline hole. Large cables are designed to fit HiyaHiya Interchangeable Needles size 9-15US/5.5-10mm. Needle lengths are measured from tip to tip. Cable color may vary.