Using these Jimmy's SmartStix Double Pointed Needles is a breeze. Just start knitting your project as you normally would. When you need to measure your work, use the color - coded one - inch intervals on the needles. To check your gauge, wrap your yarn around the needle and count the wraps per inch. As for care, simply wipe the needles with a soft, dry cloth after each use to keep them clean. Store them in a dry place, away from sharp objects that could scratch the aluminum. Avoid bending the needles as it might affect their performance.