A ring mandrel, also known as a triblet is a large, tapered tool made from steel which is perfect for forming, shaping and reshaping rings on. Most mandrels will also have ring sizes on, so you can ensure you are forming the correct sized ring. It's also great for creating wire wrapped rings too.Metal ring mandrels are a standard jeweler's tool: you can use a nylon hammer or rawhide mallet to reshape or enlarge (re-size) rings, as well as texture or stamp pewter, aluminum and sterling silver rings.The ring on your finger is a visible sign that you are in a committed relationship. It's also a declaration that the person you married is important to you and holds a special place in your heart. Wearing your wedding band is a subtle way to show your significant other how much you mean to them.