Using these addi Turbo circular needles is a breeze. Just thread your yarn through the cord and start knitting as you normally would. The smooth nickel coating helps the yarn slide easily, so you can work on your projects more efficiently. When it comes to sizing, be aware of the non - standard sizing for some of the smaller needles as mentioned in the product description. For maintenance, keep the needles clean by wiping them gently with a soft cloth. Avoid bending the cords too sharply to prevent damage. Store them in a dry place to keep them in good condition for your next knitting adventure.