I have been shaving with Gillette 7 O'Clock Sharp Edge blades and liking them very much. This morning, out of a sense of adventure, I grabbed a pack of another blade manufacturer from my original sampler kit and tried it. The shave was terrible. The thing shaved like one of my Gillette 7 O'Clocks just when I'm getting ready to change it. I'm curious to know what mystery blade this is since the outside packaging has been removed. It is in a white plastic dispenser. Blue paper at the window with white pring says "Made in Israel." Each blade is wrapped in white paper with blue print saying "super Platinum". Are they Crystals? If anyone has any thoughts, I'd be curious to know.