Using these addi Turbo Circular Needles is super easy. Just thread your yarn through the needle and start knitting as you normally would. The smooth nickel coating helps the yarn move freely, so you can work on your projects faster. When it comes to sizing, be careful as some smaller sizes don't follow the standard US measurements, so double - check before you start. For maintenance, keep the needles clean by gently wiping them with a soft cloth after each use. Avoid using harsh chemicals as they might damage the coating. Store the needles in a dry place to prevent rusting, especially for the metal parts. And remember, the US 36 and US 50 tips are plastic, so handle them gently to avoid breakage.