Using these addi Turbo circular needles is a breeze. Just thread your yarn through the cord and start knitting. When you're done, you can store them in a knitting case to keep them safe. As for maintenance, a gentle wipe with a dry cloth will help keep the nickel coating in good condition. Remember, the smaller needle sizes have non - standard US sizing, so double - check the actual size before starting your project. And be careful with the plastic tips of the US 36 and US 50 needles to avoid any breakage.