Grindstone

Grindstone

— sharpener in the form of a characteristic bar (whetstone) made of abrasive material; most often installed on a stand, but in general, stones can be sold without it. On the one hand, this is the simplest, and on the other hand, the most demanding type of sharpeners: the stones do not have any additional devices to “make life easier” for the user, and in order to comply with the necessary parameters (speed and direction of movement, clamping force, etc.) some skills. Nevertheless, such devices are appreciated by many professionals — in particular due to the fact that they are well suited for some non-standard sharpening methods. And the unambiguous advantages of whetstones can be called low cost and durability.