DERBY Professional Single Edge Razor Blades are individually packed. They are produced by the superior quality standards and from Swedish steel. They are perforated, hardened and finetuned by utilizing most advanced technology. They offer a good combination of sharpness and gentle cut, at the same time. Derby Professional single edge razor blades are perforated, hardened and ground by utilizing most advanced equipment. Cutting edges are deposited with chromium-ceramic, tungsten, and Platinum by advanced spluttering equipment for optimum edge strength promoting a longer shaving life. Suitable for all cutthroat/shavette type razors including shaving factory, dovo, focus, Parker. The packet includes 100 Derby professional blades.