Using these Addi Turbo circular needles is easy. Just thread your yarn through the needle and start knitting as you normally would. The nickel coating allows the yarn to move smoothly, so you can work on your projects without any hassle. When it comes to sizing, double - check the actual size as some of the smaller ones don't follow the standard US sizing. For maintenance, keep the needles clean. You can gently wipe them with a soft cloth after use. Avoid bending the cords too much to keep them in good condition. And remember, the US 36 and US 50 needle tips are plastic, so handle them with care to prevent breakage.