Use the SE JT-SP2 Ungrooved and Marked Ring Mandrel for enlarging, measuring, reshaping, shaping, and sizing your rings. This 13" long mandrel includes a plastic storage case for convenient storage. The dimensions of this mandrel are 13" x " x 1". SE is committed to providing the customer with the best source for value possible on the market. You will enjoy the quality, function and usefulness our SE JT-SP2 Ungrooved and Marked Ring Mandrel has to offer. IMPORTANT: Avoid receiving counterfeit items. Genuine SE products come with our SE logo on the packaging. SE is a registered trademark protected by US Trademark Law. Precisely Marked Sizing: This 13" ring mandrel is accurately marked from sizes 1 to 16, including quarter US sizes, ensuring precise measurements for ring making and sizing High-Quality Polished Steel: Crafted from ungrooved, polished steel, the mandrel offers a smooth surface that's ideal for shaping and resizing rings without causing damage Ergonomic Knurled Handle: Designed with a knurled handle for a secure and comfortable grip, allowing for better control and ease of use during jewelry making processes Ideal for Professional and Hobbyist Jewelers: Whether you're a professional jeweler or a DIY enthusiast, this tool is perfect for creating, adjusting, and repairing rings with precision and ease Durable and Long-Lasting: The robust steel construction ensures durability and longevity, making it a reliable addition to your jewelry making tools for consistent use over time