Stock up on Rockwell Double-Edge Razor Blades with this 20-Pack. (Approximately 4 month supply!) Each Rockwell Razor blade lasts between 4 - 8 shaves - now that's true shaving value. Made of Pure Swedish Stainless Steel and are compatible with all double-edge safety razors. The pure stainless steel that forms these blades protects them against rust, while the specialized treatment that crafts these blades ensures the blades retain their exceptional sharpness. Box contains 4 x 5-packs of blades.