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 measure gauge, simply count the number of stitches and rows within a certain number of inches on the needle. As for care, keep the needles in a dry place to prevent rusting. Avoid dropping them on hard surfaces as this could damage the tips. After use, you can wipe them with a soft, dry cloth to keep them clean. With proper use and care, these needles will serve you well for many knitting projects.