The Hobart 00-478747 Truing Stone is a maintenance tool designed to restore and maintain proper edge geometry on knives and cutting tools used in commercial kitchens. This abrasive stone works by removing small amounts of metal from dull or uneven edges when drawn across the blade at the correct angle, helping reestablish a consistent sharp edge. Regular use of a truing stone can impr... https://www.partsfe.co.uk/hobart-00-478747-truing-stone