Sewing machine needles come in a variety of styles, sizes and types. This video should help you determine the type of needle you need for your particular sewing project. Needle types discussed are: Round Point (Sharp) needle, Ball Point needle, SD1 needle, DI needle and the Serv7 needle. Visit Sailrite for sewing machine needles: http://search.sailrite.com/category/sewing-machine-needles-hand-needle