Thought it would be fun to polish the edge on my 6. After I did it, I was still impressed with how the blade bit into my thumb nail, but it just slid. So I went to cut some wood and the blade just likes to slide, not bite like usual. So, after all that work, it was back to the Sharpmaker to put a useable working edge on the knife. Still shaves hair, but actually bite into stuff now.