Norton IM313-11.5 Three Stone System - Fine India Medium Coarse Crystolon Stones
- 320-grit for sharpening and maintaining steel cutting edges.
- Aluminum oxide produces durable, smooth-cutting edges, and is preferred for close tolerances.
- Prefilled with oil to allow lubricant to stay on surface during sharpening.
- 1/2 x 11-1/2 x 2-1/2 inch (H x W x D) size makes this stone suitable for use as a bench sharpener for knives and tools.
- Oilstone is more durable and harder than a waterstone.