This round ring mandrel, machined from high carbon, hardened steel, and polished to perfection, is the absolute market leader in quality, precision, and ring sizing consistency. The result is accuracy and uniformity you can rely on, perfect for use with pre-shaped rings or creating truly custom shapes. This tool is perfect for jewelry-making pros, novices, and hobbyists alike. Enjoy the ultimate accuracy and versatility for any jewelry-making project.

• Ring Sizes 1-16 US with 1/2 size increments 
• Hardened and polished steel
• No groove
• Gold Standard