They are 8" in diameter, 1" wide and have a 1" center hole.
The Green Silicon Carbide wheels are good for sharpening cemented carbide tools and non-ferrous metals. Use for grinding cemented carbides and non-ferrous metals.
The Aluminum Oxide wheels are good for sharpening HSS tools and other general purpose use. Fast cutting and cool grinding of all tool steels. For grinding, sharpening and deburring of hand tools, drills, chisels, blades and cutting tools.
They include bushings for 3/4", 5/8" and 1/2" arbors.