Fiskars 93558097J Rotary Scoring Blade, Style B, 45mm Ideal for card making and paper crafts requiring folds Interchangeable 45 mm blades with a variety of cutting options Heat-treated, hardened premium steel blades for long-lasting, razor-sharp cuts Ideal for scoring paper, thin plastic, pictures, cardstock, vellum and more Clam package is reusable for blade storage