This OLFA wave rotary blade creates a wave edge for quilting, scrapbooking, and craft trims when used with a compatible cutter. One 45 mm (1.77 in) stainless steel blade is included for decorative edging on fabric, paper, and similar sheet materials for decorative borders and accents. Use the blade only with the OLFA 45 mm Deluxe Rotary Cutter and keep the cover and case in place between cutting sessions.