Lansky Puck

This is a two-sided artificial sharpening stone, suitable for sharpening axes or other large tools where it’s easier to move a small stone over a large and awkward blade than the other way around.  It’s around 3″ across and 1″ thick, with angled edges for a more comfortable grip in your hand. One side is coarse (120) grit, and the other side is medium (280) grit. They are made in the USA by Lansky.