Using these addi Turbo Circular Needles is a breeze. Just start by threading your yarn through the needle. The nickel coating helps the yarn glide easily, so you can knit smoothly. When it comes to sizing, remember that some of the smaller sizes don't follow the standard US system, so double - check the actual size. For maintenance, keep them in a dry place to prevent the nickel coating from getting damaged. Avoid dropping the plastic tips of the US 36 and US 50 needles, as they may break. Happy knitting!