I have 4 of these and bought 5 or 6 more as gifts. I keep one in my leather bag, one in my truck, another in my hunting backpack and the last one in my shop. Nothing roughens a blade quite like this sharpener. I've been buying them since 2002 and I can't tell you how good they are. I drive sailboats and nothing dulls a blade quite like cutting Kevlar or Dynamo. A rough mini-sharp requires 4 or 5 strokes and the blade is as sharp as it gets. If you want to fine sharpen your blades or chisels you