SHAPTON 50103 Water Sharpening Stone, 4000 grit. A sensational series of SHAPTON sharpening stones, where the abrasive layer is bonded to a specially prepared layer of tempered glass, which stabilizes the entire stone. Full information regarding the grit, grain size, and catalog number is printed on the glass, allowing you to use the entire abrasive layer without worrying about stone identification. The perfect bond between the glass and abrasive allows you to utilize the grinding surface down to the last millimeter without worrying about chipping. The unique structure of Glass Stones, with their highly uniform grain, allows you to sharpen any knife very effectively. This also impacts the durability of the stone, which wears extremely slowly and requires occasional regrinding. Glass Stones are among the hardest on the market. When using SHAPTON stones for the first time, they should be soaked in water for approximately 6 minutes. Specially developed "Splash & Go" technology prevents excessive water absorption by the stone. This allows you to generously spray the stone with water during subsequent knife sharpenings, eliminating the need for lengthy re-soaking. Grit: 4000 grit Grain: 3.68 µm Dimensions: 210x70x10 mm Abrasive layer: 5 mm Weight: approx. 360 g // SHAPTON 50103 Water Sharpening Stone, 4000 grit A sensational series of SHAPTON sharpening stones, where the abrasive layer is bonded to a specially prepared layer of tempered glass, which stabilizes the entire stone. Full descriptions of the grit, grit size, and catalog number are printed on the glass, allowing you to use the entire abrasive layer without worrying about identifying the stone. The excellent bond between the glass and the abrasive allows you to utilize the grinding surface down to the last millimeter without worrying about chipping the stone. The unique structure of Glass Stones, with their highly uniform grain, allows you to sharpen any knife very effectively. This also affects the durability of the stone, which wears extremely slowly and requires occasional regrinding. Glass Stones are among the hardest on the market. When using SHAPTON stones for the first time, soak them in water for approximately 6 minutes. Specially developed "Splash&Go" technology prevents the stone from absorbing excessive water. This allows for a generous spray of water on the stone during subsequent sharpenings, eliminating the need for prolonged soaking. Grade: 4000 grit Grain: 3.68 µm Dimensions: 210x70x10 mm Abrasive layer: 5 mm Weight: approx.