Aurora Arts Rotary Cutter Blades 45mm 5-Pack Fits Fiskars and Olfa Razor sharp tungsten steel means you barely have to press when you cut. The rotary cutter blades 45mm size fits absolutely any brand of rotary cutter. Precision engineering ensures an edge that lasts and lasts. Handy stay-safe case protects you and your product - no accidental cuts! No more dull edges - your tools are as precise as you are. Finish that quilt in record time!