A Barber hone is a cheap and easy way to keep your straight razors
sharp for years with the right use if the edge stays undamaged.
Barber hones are synthetic stones that were used by barbers to do a quick touch up of the edge, thereof the name. They are usually small, suited for the barbers to keep in their pocket.They are typically thin/light as well, and good ones work exceptionally well at keeping a keen shave worthy edge, keen, and shave ready by merely making 2-3 passes across the hone
every week or two.
The grit of a barber hone usually lies between 6K-12K depending on the maker, some hones
are dual sided, with one coarse and one finisher side.
Barber hones are very hard, and do not need to be lapped very often, some claim that it is unnecessary to lap them at all.