From beginning to end, all Derby Razor Blades are subjected to severe Quality Control Inspection at every stage of manufacturing process by utilization of unique quality control equipment. These Premium interchangeable razor blades are made from refined and intensively processed Swedish carbon steel. The razors are especially suitable for sensitive to normal skin and light to heavy beard growth. Derby half or single edge blades are manufactured in Turkey. The razor blades are produced from Swedish steel with a high carbon content. The cardboard Derby Premium packaging contains 100 single edge blades individually wrapped in paraffin paper. All Derby Razor Blades coated with a polymer for optimum SHAVING COMFORT. From beginning to end, all Derby Razor Blades are subjected to severe Quality Control Inspection at every stage of manufacturing process by utilization of unique quality control equipment.