WHOLESALE HAND TOOLS: SHARPENING STONE 4.5 X 2 X 1. IIT. Illinois Industrial Tool 4.5 inch double sided sharpening stone. One side is coarse grit and one is fine grit. Coarse grit side will help remove larger knicks and dents in blades while the fine grit side will smooth, refine, and sharpen your blades. Intended for sharpening all types of tools and knives. Use water or oil as a lubricant. Wholesale, 24 per case.