This Estella sharpening stone is a direct replacement for the one that came standard on your Estella SL series meat slicer. It is compatible with SLM12, SLM13, SLA13, and SLA13S meat slicers. This sharpening stone ensures that the blade in your machine stays sharp to easily and cleanly cut through deli meats and cheeses. A dull blade will not only slow down production, but it will cause messy, uneven cuts and waste product. If your original sharpening stone is worn out or damaged, replace it promptly to ensure efficient operation of your meat slicer.