I've used Treet DuraSharp a few years ago, and they just left an impression of very mild, really not so sharp blades. I used to use them in aggressive razors, and they were okay. I even proposed them to others in order to "tame" aggressive razors. Well, I decided to get back to them now and had two horrible shaves. They were ROUGH and CUT ME. No more Treet Durasharp on my list. Threw away the 200 I had to the garbage bin. Thankfully they are cheap as dirt. But anyhow, I'm .