●SKH-9 BlADES - Made from High Speed Steel (SKH-9) that stay sharper longer than SKS-7, the blades go through 4 individual sharpening stages that stay sharper. ●SURFACE LENGTH - Markings Our 45mm rotary blades have clearly visible length markings on the surface for you to roughly measure the length while in use. ●IDEAL CUTTING TOOL - Perfect rotary blades 45mm for quilting, sewing, arts&crafts, Ideal for cutting multiple layers of fabric, fleece, felt, leather, cardboard, wallpaper, vinyl and other DIY Projects. ●QUICK & EASY BLADE REPLACEMENT - KEARINGs SKH-9 45mm Blades with all 45mm rotary cutters. ●Packaging - Each package has 5 oiling blades (oil to prevent scratching) in a plastic storage box. Enables better blade protection and maintenance.