HORL® Diamond Standard SharpenerHORL Diamond Standard Sharpener Durable Standard Diamond Grit Original HORL Diamond Standard Sharpener separately. Very durable and pre assembled on any HORL Sharpener. The first few times you use the diamond grinding side, excess diamond particles may be noticeably peeling off. After a few applications, the grinding sound becomes quieter and the grinding surface much finer with HORL Diamond Standard Sharpener.