Description: - Suitable for grinding jade, agate, other materials - The Mounted Point can be installed on the electric grinder, hanging mill and hand electric (not included here). - coated, high quality, durable - Easy to useSpecification: - Diameter: Approx.25mm/ inch - Head Height: Approx.18mm/0.71 inch - Rod Length: Approx.35mm/1.38 inch - Material: Metal, Diamond - Color: SilverPackage Includes:1 Piece Diamond Grinding HeadNote:Must use cold water to cool the head before use it.