ULTRA DURABLE Titanium coated SKS-7 tungsten steel blades which give greater life span with a razor sharp cutting edge which will last a lot longer than uncoated steel blades.No Rust. Perfect Blades for quilting, sewing, scrapbooking supplies ,art and crafts: Rotary cutter blades can be used to cut fabric, paper,fleece, felt, vinyl, leather, cardboard, wallpaper, and more. Designed to fit 60mm rotary cutters.COMPATIBLE, these replacement blades are compatible to for all type 60mm rotary cutter. Package include 10pcs titanium rotary cutter blades 60mm, and 1 piece storage case