28774 Features: -Mounted points cylinder.-High quality.-Material: Aluminum oxide.-Ideal for hard material such as cast iron, unhardened steels, non-ferrous metals, hard metal alloys, welded joints, rivets and rust.-Ideal for sharpening, deburring and general purpose grinding. Dimensions: -Overall dimensions: 0.39" H x 3.54" W x 3.14" D, 0.2 lbs.