The leather blank is intended for final finishing of the cutting edge of the knife. It is clamped in the holder of the abrasive. Leather corrects the unevenness of the cutting edge and strengthens it. The working surface is made of very smooth high-quality cow leather, pasted onto a blank from natural wood. On the velvet side, paste is applied for manual polishing. Editing the knife is done by progressive movements with respect to the angle of sharpening. It is possible to work both with or without paste, or to use the finish one on the smooth side. The dimensions are 170x30x10 mm.