Derby Extra Double Edged Razor Blades.
These standard double edge blades will fit any DE safety razor. Derby extra stainless steel blades are further plated with chromium-ceramic, tungsten, and platinum to ensure a smooth, safe, irritation-free shave. All Derby blades are perforated, hardened, and ground by utilizing the most advanced equipment.
This is a great blade for men and women that have very fine to medium thick hair follicles.