High Quality Materials: This Mach3 razor blade uses 3 layers of high-quality inductive nano blades. The blades are treated to ensure smooth shaves. Front Hinge Technology: Front Hinge technology brings greater angular flexibility, and sensor head, which fits facial curve like water, shaving is cleaner. Front pivot transfers the pressure of your hand away from the blades for better skin comfort. Mach 3 Razor Blade Refills: The 3-layer Men Razor Blades are universal, convenient and fast to meet your needs, the elastic sensor blade helps to detect subtle waves on the skin of the face. Anti-clog Design: Anti-clog design for quick rinse. This razor blade uses 3 layers of high-quality inductive nano blades. The blades are treated to ensure smooth shaves.Package contains: 4 sets, one set of 4 blades, 24 blades in total