Grit Table / diamond / ZenSharp diamond cards
Product, maker micron
Diamond-card sharpening system, micron-rated
This is Zen-Wu's own product, listed here on the same terms as every other. The ZenSharp cards are diamond, labelled coarse to ultra-fine with a micron marked on each card (45, 20, 9, 3). That is a maker figure, so we tier it maker-published, not measured, and we publish no distribution yet, so each card is a single point. Building the table does not earn our own product a better tier.
Each grade below shows its size in microns, its spread (the published distribution, where a maker or standard gives one; most makers publish none), and where that size lands on the reference scale, a shared yardstick for reading grit numbers across makers.
The coarse card.
The everyday card.
Enough to finish an edge for most woodworking.
For sushi knives and the finest finish.