Longer answer on it's way.Thanks for the info!
I saw your previous [very thorough] posts on injectors. Can't wait.Longer answer on it's way.
My wife, daughter and myself use Twin blades in the Schick H razors. We all have our own.I've also known at least 2 individuals who have put a twin their Eversharp Fashion Razor (Type H) -- it is not recommended (by me at least), but apparently those couple of guys thought it improved the shaves for them. I'm also not sure what (if any) after-effects were on the razor head.
For Schick injectors anything made after 1972 for sure. I am not sure the exact introduction of twin blades on the market but 72 on is guaranteed to be a fit for those blades.
There are two of them.What's the difference between the twin blades and regular blades? Are these sharper or less sharp? I assume twin blades were invented in the US (by whom?) and are there still any twin blades being made here?