Norton Waterstone, 220 grit, 1" x 3" x 8" in Blue Plastic Hinged Box Waterstone to create abrasive slurry for effective sharpening with less pressure than an oilstone requires 220 grit for repairing steel cutting edges 1 x 8 x 3 inch (H x W x D) size is suitable for use as a bench stone for knives and tools Cleans up easily with water as lubricant instead of oil Blue plastic hinged box with no-slip rubber feet can be used as holder for the stone during sharpening