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 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