Premium Japanese SKS-7 Steel Build：Razor-sharp, rust-resistant blades made of high-grade Japanese SKS-7 steel cut cleanly through 10 fabric layers at once—long-lasting durability with no bending/breaking. Universal 45mm Compatibility：Fits all 45mm rotary cutters (for Olfa, for Fiskars & more) — perfect drop-in replacement for quilting/sewing/craft tools. Multi-Material Versatility：Ideal for sewing, quilting, scrapbooking & arts crafts; cuts fabric, leather, vinyl, paper, felt (up to 8-16mm thick layers). Precision Length Markings：Clear surface scale lines enable on-the-go measuring — boosts accuracy for quilting/crafting projects, saves time. 10-Pack with Safe Storage：10 oiled blades (anti-scratch) in a snap-close plastic case — ample spares + secure storage to protect blades/fingers.