Norton Combination 220/1000 & 4000/8000 Grit. 8" x 3" x 1" Benchstone

Uses water as a lubricant and flushing agent. Easier to clean than oilSharpener. Won't leave an oil residue. Ideal for sharpening woodworking tools, knives, cutlery, and other blades. Durable blue plastic storage boxes.

This is an estate find. I don’t know anything about them, but am happy to field questions. Box is cracked on side. See photos. Good luck!