These swivel cables work with all KnitPro needles. These purple coated stainless steel cables are strong and flexible, each is made of the finest grade material. With a 360 degree swivel mechanism these cables are memory-free for no twisting. The connections twist independently of the cable, moving with you as you knit, so your cables do not twist or pull against you. Each cable pack also includes purple coloured end caps and cable keys used for tightening the tips to the cable.