This 5-pack of Creative Grids® 45mm Replacement Rotary Blades is ideal for quilters and sewists. The blades are made of carbide steel and designed to fit the Creative Grids® Rotary Cutter (CGRCUT45) and most other 45mm rotary cutters. They are sharp and durable, and will glide through fabric, vinyl, cork, and more with ease. The blades come in a reusable plastic storage container, making it easy to store and transport.