Here's what it's touted to do (oh, and the groovy thing is, it's supposed to fit all brands of rotary cutters):
- The Edge Perfect Blade cuts perfectly spaced perforations and makes hand finishing on fleece, felt, sweatering and other non-woven fabrics quick and easy
- Decorative yarns easily slip though the perforations without tugging or resorting to a pliers to pull the needle through fleece, felt and other sturdy fabrics
- Hand stitches such as whip or blanket stitch are perfectly spaced, eliminating the need for marking and pre-punching holes with an awl or punch
http://www.nancysnotions.com/product/edge+perfect+blade.do