Using these addi Turbo circular needles is easy. Simply thread your yarn through the cord and start knitting. The nickel - coated surface allows the yarn to move freely, so you can work quickly. When it comes to the non - standard sizing, double - check the actual size against your pattern requirements. As for maintenance, keep the needles in a dry place to prevent the nickel coating from corroding. If you're not using the plastic - tipped needles (US 36 and US 50), store them carefully to avoid scratches. With proper use and care, these needles will serve you well for many knitting projects.