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Depends on the brand, but it isn't that easy,,, The binder plays a part too, how the binder breaks down and releases the grit changes the equation..

How the Barber's Hones were made is a mystery...

The density of the grit and the type of grit it is

Barber's hones have a high cutting function as compared to an equal grit water stone.. because they have a high density and a an aggressive type...