Derby Extra double edged safety razor blades are compatible with all makes of double edged safety razor. These blades are manufactured in Turkey and are tripled coated chromium, ceramic, platinum and tungsten, with a polymer coated edged.\nThis great value economy sleeve of 20 packs of blades contains a total of 100 razor blades. Giving you almost two years’ worth of shaving in one pack!\nOne pack retails for £1.90, 20 packs = £38.00, our price is only £20.00.