Blade Wars: Kai vs. Gillette Silver Blue This blade war features Kai from Japan and Gillette Silver Blue from Russia. Amazon sells 50 Kai blades, which are made with surgical-grade stainless steel, for $23. GSB’s cost half that on the same site. I’ve never tried Kai before, but it has the reputation of being smooth and extremely sharp. GSBs are one of my favorite blades. I find them to be sharp and very smooth. My razors for this blade war will be two Wet Shave Club chrome razors. I’ve colored the cap of one razor with a black laundry marker so I can tell them apart, but won’t know which blade is in which razor. I’ll shave half of my face with each razor and switch sides with subsequent shaves. As we go, I’ll share what I experience and invite you to comment. I’d love to hear your thoughts. Do you think Kai razor blades will prove that they are worth the money? Do GSBs merit all the praise they get on this forum? Let’s put it to the test!