Using these addi Turbo Circular Needles is super easy. Just thread your yarn through the cord and start knitting as you normally would. The nickel coating allows the yarn to move smoothly, so you can work on your projects quickly. When it comes to maintenance, keep them away from sharp objects to avoid scratching the coating. If they get dirty, you can gently wipe them with a soft cloth. Be aware of the non - standard sizing for some of the smaller needles, and remember that the US 36 and US 50 tips are plastic, so handle them with care to prevent breakage.