Made of premium steel for long-lasting sharpness, Fiskars 45 mm Perforating Rotary Blade prepares fleece for crocheting or stitching, perforates paper or cardstock for forms or raffle tickets and more. It is packaged in a unique blade tray that makes blade changes with Fiskars 45 mm Rotary Cutters (items 118310, 118410, 160310, 160410, 185310) safer and quicker, and even touch-free when used with the Fiskars Easy Change models (items 160710, 118730 or 185710), for ultimate safety. It also fits most standard 45 mm rotary cutters on the market. Details: 45 mm 12 perforating rotary blades Fits most standard 45 mm rotary cutters on the market Perforates fleece for crocheting or stitching, paper, cardstock, thin plastic, canvas and more Made of premium steel, precision-ground for long-lasting sharpness Included tray may be used for disposal of worn blades