This OLFA scallop/peak rotary blade creates a finished decorative edge for fabric trims, photos, and paper crafts and add a decorative border on projects. The 45 mm (1.77 in) stainless steel blade has two profiles, with a scallop edge on one side and a peak edge on the other. It is designed for the OLFA 45 mm Deluxe Rotary Cutter, and it should be changed and stored with the safety cover engaged Use steady pressure for even edging.