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I recently bought a puck to try. I have found them to be very good when used in my razor rock mamba. I have not tried them in any other razor yet. But I feel that they will do as well. So far I have gotten 5 three pass shave with no nicks or cuts. They may not be as sharp as the feather blades that I normally use, but nice to know that I have found another blade to get a close shave. Also, they are far less expensive too. I hope this helps?
SuperMax Blue Diamond Platinum are right up there with my top blades. Sharp, not quite as sharp as a Feather, but more durable. I like my Feathers, but SuperMax are my most cost-effective blades. Based on a trial tuck of Polsilver, SuperMax wins on both performance and price.
Finally got around to trying a tuck of these from a blade sampler. Threw it into a Tri-Slot Tech. Figured it would be similar to an Astra, Personna, etc. WRONG! Hadn't shaved two centimeters before I realized these were akin to Feathers, IMHO. Sharp, sharp, sharp. Close, close, close. Part of...