Knit Pro cables are used with interchangeable needles and are available in a range of sizes. Product Details: Flexible thin cables that are best in their category - with almost no memory Smooth cable joins - enables stitches to slide around effortlessly Long threaded joins to ensure that cables and needle stay connected Tightening hole provided in the join for that extra tightening Specially designed Tightening key that facilitates effortless tightening Cable caps that fit on the cable joins to keep the knitting safe Available in lengths of 40 cm (16 inches), 60 cm (24 inches), 80cm (32 inches), 100 cm (40 inches). Please note that the length includes the size of the needles, thus 40cm length is cable + needles. Packaging Details: Each set has one cable, two plastic end caps and one tightening Allen key