Using these Addi Turbo circular needles is a piece of cake. Just thread your yarn through the cord and start knitting as you normally would. The smooth nickel coating makes the yarn glide easily, so you can work quickly. When it comes to sizing, double - check the actual size as some of the smaller ones don't follow the standard US sizing. Be gentle with the plastic needle tips on the US 36 and US 50 needles to avoid breakage. To keep your needles in top shape, wipe them with a soft, dry cloth after use. Store them in a cool, dry place to prevent any rusting on the metal parts and damage to the plastic tips.