Check the listing for details. Shapton Glass Stone 4000 Grit 5mm. Condition: New. Listed at 71.98 USD. NEW, Shapton Glass Stone 4000 Grit 5mm, 834943, Measures 2-3/4” W x 8-1/4”L, Shapton Glass Ceramic Water Stones are the finest manmade ceramic water stones….period! This claim is based largely on two properties - the speed at which the Shapton stones cut and the edge they create. Shapton stones are designed to be harder, faster cutting, and denser than any other ceramic water stone on the market. Because they remove material quickly, the time required to hold a tool angle on the stone is reduced, making free hand sharpening much easier. Equally important to cutting speed is the consistency of the finished edge. The sharpest cutting edge is created by the finite intersection of two highly polished, flat surfaces. The finishing grits (16000 and 30000) of the Shapton stone system leave a.