These blades fit all the Gillette Fusion razors. I am usually skeptical of 5 razors blades, but this time I must say that I feel a real shaving comfort with them. The result is as polished as with my usual 3 Mach3 blades, which I did not complain. Nevertheless Fusion blades offer a smoother shave, it feels immediately. The tighter blades also make it more difficult to carve, very good point. In short, I am very satisfied with these blades.