OLFA s Rotary Blade 45mm Refill. These replacement blades are made with high-quality tungsten steel for durability and superior edge retention. They cut up to 8 layers of cotton fabric at once and can be used on fabric paper leather and other materials. These blades are for OLFA s 45mm Standard Deluxe and Quick Change Rotary Cutter (not included). This package contains two blades and a plastic container that you can use later for storage. RB45-2 1079062. Imported.