These knitting needles and crochet hooks are great for DIY sweater weaving. To use them, simply pick up the appropriate size needle or hook according to your project. Start by threading your yarn through the needle's tip or hooking it onto the crochet hook. When knitting or crocheting, keep a steady rhythm. As for maintenance, after each use, gently wipe them with a dry cloth to remove any dust or yarn fibers. Store them in a dry place to prevent rusting of the stainless - steel parts and warping of the bamboo. Avoid dropping them from a height as it may damage the tips. Enjoy your creative projects with these wonderful tools!