Gingher Knife Edge Sharpening Stone... Regular maintenance is essential to keep Gingher’s Knife Edge scissors blades at peak cutting performance. Regular use of the G-S Sharpening stone extends blade life. Verify that your scissors have a knife edge by first reviewing the product information included with the scissors or available on-line. Damaged Gingher scissors can be returned to Gingher for proper edge re-grinding, re-controlling the blades and re-setting the points. Each sharpening stone is packaged with a fitted leather sheath for storage. Hint: Only the knife edge of your Gingher scissors should be sharpened. The blade bearing the Gingher trademark is the normal edge and should never be sharpened.