Using these ChiaoGoo Knit RED Circular Needles is easy. Just thread your yarn through the cable and start knitting. You can use them for all sorts of knitting projects like scarves, hats, and sweaters. When using, make sure the yarn doesn't get caught on the cable. To maintain these needles, keep them in a dry place. You can clean them with a soft cloth. Avoid bending the cable too much as it may damage the needle. If you notice any fraying on the nylon coating, it's best to replace the needle to ensure a smooth knitting experience.