I tried these blades in an Oren razor. Surprisingly, they aren't as sharp as a peroproguard's blades. I figured since they don't have protection they would be a bit sharper. But I found them to be a soft blade. Although the Proguard blades were sharper, they don't cut or cut worse than these blades. However, Kai blades are slightly cheaper. I will report my findings. The next few shaves were very rough on my skin. I carefully examined the razor blades under the gun. The photos show the new blades that I removed from the injector. I was surprised to see all the particles on the blades. I couldn't see anything just by looking at her. Only under a microscope could I see all the particles. I tested several other razor brands and they didn't look like this one. These razors are not very clean and do not shave well. I suspect a cleaning blade will work better. It might just not be that batch clean, or it might be the supplier.
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