GGG

Anybody try these? They were mentioned on another forum

https://www.amazon.com/Spyderco-4640133-Benchstone-Fine-Box/dp/B000Q99RVI

quoting the poster:

These stones are used dry; the waste appears as a fine dust on the surface and
can be wiped away. If further cleaning is needed, water with something like
Scotchbrite works well. The stones are impervious to water - e.g. they can be
autoclaved for sharpening surgical items.

One huge advantage of these stones is that they stay FLAT. Spyderco say that the
medium, brown, stone is an open cell texture that might wear slightly over time,
the others showing little or no wear over time. They come guaranteed flat over
their 8in length - if the medium stone has worn at all - over many years of
sharpening some very hard steels and other metals - I can't notice it! But I'm
still careful to use the full surface as far as possible. This feature makes
them superb for sharpening plane irons, especially.

Ed Minch