Using these Jimmy's SmartStix Double Pointed Needles is a breeze. Start your knitting project as you normally would. When you need to measure your work, just use the color - coded markings on the needles. You don't have to stop and find a separate ruler. For best results, make sure your hands are clean when using the needles to avoid getting dirt on them. To maintain these needles, wipe them down with a dry cloth after each use. Keep them in a dry place away from moisture to prevent rusting. Don't expose them to extreme temperatures as this might damage the aluminum. And remember, each set comes with 5 needles, so keep track of them to avoid losing any.