Atoma 400 Grit Diamond Plate, 210x75mm

Works beautifully for flattening my stones, and the side of it makes a perfect straightedge for checking their flatness.

I use the Atoma 400 Grit Diamond Plate as a dual purpose plate.
First, I use it to start the sharpening process on dull knives. The Atoma 400 forms a burr very efficiently and does not require flattening after use.
Second, I use it to flatten my whetstones, leaves a nice smooth finish.
An unexpected benefit was that it fits int my Shapton Glass Stone Holder.

Very happy customer
Garth

I use it for lapping my shapton kuromaku stones. It works great, except it is not long enough, but this is not a tool's fault, more like mine. It cannot make my stones flat across the length, but stones are very flag across the width. Otherwise I'm pretty happy with it, planning to get ATOMA-140 when it is back in stock.

Super happy with how fast this cuts. Bought it for stone flattening and for quick removal of material.