Sharpeners holds stones, rods, pull-through sharpeners, guided systems and strops. It is a small, practical category: enough to keep every knife we sell working, without becoming a sharpening-equipment shop.
Ordinary aluminum-oxide stones handle budget and mid-tier stainless well. High-carbide steels such as D2, S35VN, CPM-20CV and MagnaCut want diamond or good ceramic.
Serrated edges need a tapered rod, not a flat stone. A recurve needs a rod too.
A medium and a fine stone, or a two-sided combination stone, plus a strop, covers almost everything most people own. Add a tapered rod if you carry serrations.
See stone versus pull-through before buying, because the two are not equivalent tools.
As of this build the category holds 17 live products, which is 1% of everything we list, across 3 brands (Buck, Case, Kershaw), priced from $7.43 to $102.89. The most expensive pieces in it today are Case Tri Hone Sharpening Kit, Case EZ Hone Sharpening System, Buck EdgeTek Ultra Steel.
These numbers are recounted every time the site is rebuilt, so they track the live catalog rather than a figure typed in once.