I can get 7 shaves from almost any blade, Derby Extra included. The only blade I like that hasnt gone that far is Feather. I've gotten 5 shaves from a single Feather.
A single Polsilver went 20 and had more left in it when I tossed it to test a Gillette Yellow. That yellow went 9 but started to tug at 7.
A single Perma-Sharp Super went, I think, 24 shaves and wasnt finished yet.
A single Polsilver went 20 and had more left in it when I tossed it to test a Gillette Yellow. That yellow went 9 but started to tug at 7.
A single Perma-Sharp Super went, I think, 24 shaves and wasnt finished yet.