Spinning your ring on a lathe makes ring making significantly easier compared to using a rotary tool or other methods. You’ll achieve a more professional finish consistently. If you’re making rings in multiple sizes, this steel expanding ring mandrel set is highly practical—it allows quick size changes and a secure fit in seconds. This large expanding ring mandrel for lathe accommodates ring sizes 7.5 to 10.5. The set includes a hex wrench for expanding and contracting the mandrel. It features a 7-inch base compatible with various chucks and can be used in a lathe or drill. Using this expanding mandrel is simple and efficient. Each size step provides extra space to apply tape, helping protect the interior of your rings from scratches. For optimal performance, apply one or two layers of tape to the step you plan to use. The expanding mandrel delivers high precision for ring making and is designed for lathe use. It also fits a 1/2-inch drill chuck. Made from wear-resistant stainless steel, these mandrels resist rust and wear—even with frequent, heavy use—unlike wood or carbon steel alternatives. Color: As shown Material: Stainless steel Package Includes: 1 x ring mandrel Note: Due to lighting conditions and screen variations, the item’s color may appear slightly different from the actual product. Measurement tolerance: ±1–3 cm.