Gillette Mach3 razor blades for men have stronger-than-steel blades that stay sharp longer (cf. Sensor3). With sharper blades (2 first blades compared to Sensor3), it is designed to hold 15 comfortable shaves. These Gillette razors have a lubricating strip that glides to help protect skin from redness and a micro-thin skin guard for stretching the skin and prepare the hair shaft for the cutting blade. Mach3 razor blade for men fits all Mach3 razors.