I got a piece of 4x8 x1/4" tempered glass. It's been here for years. Long before me. It does have scratches but they're no big deal. I've dropped stuff on it, stood on it and done all kinds of other things to it. It works great. I've been told that stainless steel blades don't scratch glass. I don't believe that. In my experience, a brand new blade will be sharp enough to cut the glass until it dulls down a bit. Once a little dull, you're good to go.