The HORL 3 Premium Set is designed for further refinement after sharpening with the standard diamond and ceramic discs. It includes a fine corundum whetstone, an extra-fine corundum whetstone and HORL leather. Both whetstones are used dry: the fine stone smooths the cutting edge first, followed by the extra-fine stone for an even finer finish. The vegetable-tanned cowhide leather is then used to remove residual grinding particles and remaining burrs for a clean, professionally finished edge.