Work Sharp Guided Field Sharpener. Two grades of diamond-embedded plates (they have a wider range available), a ceramic hone and a leather strop in a package about the size of a large harmonica, too big for my pocket, but easy enough to stash in a back pack or travel bag. It was under $30, but the price is creeping up.
The strop gets the most use. My knives cut paper cleanly and most of them will shave arm hair.
The strop gets the most use. My knives cut paper cleanly and most of them will shave arm hair.