Round 0.3mm-1.0mm Ultra Slim Diamond Files-Various Grits

Great Files

I bought the 0.9, 0.7, 0.5, & 0.3 mm round files. All of the files have sharp points (like a round tooth pick). I used the 0.9 and 0.7 mm sizes to sharpen a micro-serrated kitchen knife. They worked great. I thought I wouldn't be able to sharpen that knife until I saw these files offered by Otto Frei.