- All Derby Razor Blades are Manufactured from stainless razor blade steel strip from Sweden. - All Derby Razor Blades are perforated, hardened and ground by utilizing most advanced equipment. - All Derby Razor Blades cutting edges are deposited with CHROMIUM- CERAMIC, TUNGSTEN AND PLATINUM by advanced Spluttering Equipment for optimum EDGE STRENGHT thus longer shaving life. - 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 processes by utilization of unique quality control equipment. - All Derby Razor Production is granted with TS-EN-ISO 9001:2000 QUALITY MANAGEMENT SYSTEMS. - Ming Shi Safety Razor fits all double edge blades. Its "twist to open" technology makes it easier to change blades. Computer designed perfect angle provides a closer, more comfortable, smoother shave.