This Blue Point by Snap-On combination wrench is a vintage 5/16" tool with a 12 pt drive type and OEX-100 manufacturer part number. It is a single item that is perfect for any automotive tool collection. The wrench is made in the United States and has a system of measurement in SAE. This tool is ideal for those who are looking for a reliable and durable wrench for their automotive repairs. It is a non-domestic product and does not come with any warranty. The wrench is a perfect fit for any 5/16" job and is sure to get the job done efficiently.