It’s a little pedantic, but what you’re calling “straight razor”, you probably mean “disposable razor” or “cartridge razor”. There is also “safety razor” which

It’s a little pedantic, but what you’re calling “straight razor”, you probably mean “disposable razor” or “cartridge razor”. There is also “safety razor” which has replaceable blade, shown in the article. The “straight razor” looks like a long foldable knife.