The Gillette Mach3 men’s razor blade refills are engineered for a precise, classic shave you can trust. With three stronger-than-steel blades that stay sharper for longer (vs. Sensor3). All Mach3 blade refills fit all Mach3 handles. Engineered with precision cut steel for up to 15 shaves per blade 3 blades for a classic smooth shave Stronger-than-steel blades stay sharper for longer (vs. Sensor3) Up to 4 months of shaves per pack