This tool is used to tighten the sprocket ring nut on a Ducati Bevel Drive Twin. The OEM Equivalent is #88713.0104. This is a set, with a new nut. If you are looking for only the tool, or only the nut, send us a message, we can offer you that as well! This tool is brand new. A must have tool for anyone working on a Ducati! This tool is not made in China or Hong Kong. It is professionally made in the USA on the state of the art CNC equipment with 100% quality inspection.