paula, i think some time it is called a surger. It is one of those machines that has 3 or 4 needles. it folds over the edges and stitcches it so it will not ravel. Plodder > OK, so whats an "interlock" sewing machine??? > > Paula > * From the AT-L | Need help? http://www.backcountry.net/faq.html * ==============================================================================