ARTEZA 45mm Quilting Rotary Cutter Replacement Blades, Fits Olfa & Fiskars (Pack of 10) Set of 10 high-quality 45mm rotary cutter replacement blades Comes in a case to keep the blades safe and lubricated Compatible with all rotary cutters, including Olfa and Fiskars Constructed from strong Japanese tungsten SKS-7 steel Easily cuts 4 layers of fabric and stays sharp longer than other blades