Using Jimmy's SmartStix Interchangeable Needles is a breeze. Just pick the right needle tip size from US 2.5 - 11 for your project. Pair it with the appropriate Jimmy's Smart Cord. As you knit, use the 1 - inch markings on the needle tips to measure your work or check the gauge. When you're done knitting, gently wipe the aluminum needles with a soft, dry cloth to keep them clean. Avoid using harsh chemicals as they may damage the finish. Store the needles in a dry place to prevent rusting. If you want to use a different size, simply swap the needle tips. And remember, if you're looking for a full set, our SmartStix Interchangeable Needle Deluxe Sets are a great option.