This is a pack of 2 x 30 feet bobbins of CanaKit Conductive Thread spun from stainless steel fiber and wound on a plastic bobbin. Use it to sew up all of your e-textile projects. These small bobbins are a great way to get into wearable electronics without the upfront cost of buying an entire spool of thread. 60 feet of thread is enough to get a simple design stitched onto your shirt, backpack or hat. What sets this thread apart from the other conductive thread that we carry is the fact that it's actually spun from stainless steel fibers and doesn't have a Nylon core. This means that while it may not be easy to solder to, because it's stainless, it also won't burn up when you touch it with a soldering iron. Also, it's somewhat 'hairy' and can be slightly more difficult to work with in close, fine conditions than the other thread. Our resident E-Textiles expert suggests waxing the thread for hand sewing, as this should take care of any 'hairy thread' issues. Since waxing is impractical in machine sewing applications, avoid sewing close connections by machine as the 'hairs' could potentially short across small distances.