Why Are There 2 Slots in a Grindstone?

A grindstone is a round stone used for grinding and sharpening tools. It is usually made from sandstone.

A grindstone typically has two slots – one for coarse grinding and one for fine grinding.

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The coarse grinding slot is used to grind the edges of the tool down to a blunt point. The fine grinding slot is used to sharpen the edge of the tool.

There are two slots in a grindstone because different tools require different levels of sharpness. For example, a chisel requires a very sharp edge, while a gouge can be used with a less sharp edge.

The different slots in a grindstone allow the user to create the perfect edge for their needs.