Spin cables are accessories for ChiaoGoo's interchangeable knitting needle systems. These cables work equally well with the "Spin" bamboo tips or the "Twist" stainless tips. Spin cables are made of flexible nylon and swivel at the connector to ensure that your needles do not loosen themselves. Be sure to purchase the correct size cable. Small cables are for use with needle tips size US 2 (2.75mm) through US 8 (5mm), which large cables are for use with needle tips size US 9 (5.5mm) through US 15 (10mm). Cable length is from connector to connector, so add either eight inches if using the four inch tips or ten inches if using the five inch tips to determine total needle length. Please note that eight inch cables are only compatible with the shorter, four inch needle tips.