3000/8000 Grit WhetstoneThe SEIDO 3000 8000 combo grit whetstone is both a knife sharpening stone and a finishing stone. It's a great way to sharpen your dull knives, to repair chipped edges and for a silky smooth finishing. Unboxing the 3000 8000 Grit Whetstone: Video Demo & Features The #3000 grit side is a great middle grit soaking stone and coarse enough to bring a dull knife back to life. It's the perfect stone to touch up an edge when a full sharpening progression