Using this needle set is easy. First, pick the right needle size for your project. The larger 48mm needles are great for bigger areas or thicker materials, while the 39mm ones are good for more delicate work. Thread the conductive thread through the needle's eye, and you're ready to start stitching. When you're done, store the needles back in the envelope to keep them organized and safe. Be careful when handling the needles as they are sharp. Also, avoid bending the needles too much as it can affect their performance. To keep them in good condition, keep them dry and away from moisture to prevent rusting.