Sharpening stones wear out during use. Even the most expensive sharpening stones and even while using the best technique. This lapping stone ensures that the sharpening stone wears out evenly to make sure the stone will always stay flat. It also removes all metal particles from the sharpening stone so that your stone not only looks better but also remains effective.

Simply add water to the stone you wish to lap and move the lapping stone over the sharpening stone using round movements until all sharpening particles have been removed.