Using these addi Turbo Circular Needles is easy. First, choose the right size according to your knitting project. Thread your yarn through the needle, and start knitting as you normally would. The nickel - coated surface allows the yarn to move smoothly, so you can work faster. When it comes to maintenance, keep the needles clean. You can wipe them gently with a soft cloth. Since some of the smaller sizes don't follow standard US sizing, double - check the size before starting your project. And be careful with the US 36 and US 50 plastic tips as they're not as sturdy as metal ones.