Gillette Mach3 razor blade for men has stronger than steel blades that stay sharp longer (cf. with Sensor3). With sharper blades (2 first blades compared to Sensor3), it is designed to hold 15 comfortable shaves. These Gillette razors have a lubrication strip that glides to protect the skin from redness and a micro-thin skin guard to stretch the skin and prepare the hair for the cutting blade. Mach3 Men's Razor Blade Fits All Mach3 Shavers.