Amazon.com Product Description
Compatible with the DELTA 23-710 Sharpening Center, the DELTA 23-713 5-inch Dry Grinding Stone is made of vetrous aluminum oxide for cooler grinding and sharpening. With 120 grit for quick material removal, this stone measures five inches in diameter and sports a 2-inch face width. This grinding stone comes with a 1/2-inch arbor and can operate at a maximum of 4,970 RPM.
From the Manufacturer
Designed specifically for the 23-710 Sharpening Center, this dry grinding wheel removes nicks and sharpens plane irons, chisels, and planer blades without overheating. It is made of vitreous aluminum oxide to grind quickly with less heat build up. Includes one grinding wheel.