This 5-pack offers a month's supply of double-edged razor blades. Rockwell Double-Edge Razor Blades are made of Swedish Stainless Steel, and are compatible with all double-edge safety razors. The pure stainless steel that forms these blades protects them against rust, and the specialized design ensures the blades retain their exceptional sharpness. Rockwell Double-Edge Razor Blades are certain to provide a smooth, close shave at an unbelievable price.