For improved finish and blade performance. Lay the side of the wood handle on the table surface and place the silicon carbide stone against the back of the blade to round off the edges. No lubricant needed. The Finishing Stone permits tighter radius cutting, prevents excessive wear on thrust bearings, provides a smoother finish on the workpiece during radius cutting and removes mushrooming on back of blade caused by pressure against thrust bearings. Prolongs blade life. Comfortable wood handle. Do not oil.