Shapton Glass Stone - Seven Sharpening StoneShapton has expanded its sharpening solutions with the Glass Stone Seven Sharpening Stone collection. FEATURES 100% warp free Pre soaking not required Easy to use and maintain Spray stem wot water before use Ideal for kitchen knives and pocket knives Made from Japanese water stone and tempered glass MATERIALS Abrasive water stone Tempered glass base SPECS 6. 3 x 1. 45 x 0. 47 (16 x 3. 7 x 1. 2 cm) 7 mm of abrasive Japanese water stone COUNTRY OF