Using these Jimmy's SmartStix Double Pointed Needles is easy. Just pick up the needles and start your knitting project as you normally would. The color - coded intervals are super handy. If you want to measure your work, just look at the markings on the needles. When measuring gauge or doing wraps per inch, use the one - inch intervals as a guide. As for maintenance, keep them in a dry place to prevent the aluminum from rusting. Avoid dropping them on hard surfaces to prevent bending. And when not in use, you can store them in a knitting case to keep them organized.