Using these addi Turbo Circular Needles is easy. Just thread your yarn onto the needle and start knitting as you normally would. The nickel coating helps the yarn glide, so you can work quickly. When it comes to the different sizing, always double - check the actual size against the label. For maintenance, keep the needles clean by wiping them gently with a dry cloth. Avoid using harsh chemicals as they may damage the coating. Store the needles in a dry place to prevent rusting or damage to the plastic tips if you have the US 36 or US 50 ones. Enjoy your knitting with these great needles!