With this big set traditionally spooled onto a cone, you can also thread a smaller bobbin for sewing machine use. Each spool is high quality and made from the very best polyester material. Our spools fit most universal sewing machines. This is essential for avoiding any issues that could be caused by the threads such as knots and jams. This kit is also ideal for hand sewing. Our polyester sewing thread is durable, strong and soft. It resists shrinkage and are washer and dryer safe. In addition, they dry with speed and they resist wrinkles. They will make your sewing efficient and effective