Using these ChiaoGoo RED Lace Circular Needles is a breeze. Start by threading your yarn through the cable and onto the needle tip. You can then begin your knitting project as usual. When choosing the right needle size, remember that the US 17 (12.75mm) needles have a non - standard measurement. For best results, use high - quality yarn that will work well with the smooth surface of the needles. To maintain your needles, simply wipe them down with a soft, dry cloth after each use. Avoid using abrasive materials that could scratch the stainless steel or damage the red nylon cable. Store them in a dry place to prevent rusting. With proper care, these needles will serve you for many knitting projects to come.