Rathburn Ring Enlarger Tool – Professional Ring Stretcher with Stepped Collet & Tapered Pin – Jewelry Ring Size Expander for Bands, Metalworking & Repair (US Sizes 8–16)

This Rathburn Ring Enlarger Tool is designed for jewelers, metalsmiths, and repair professionals who need a safe and controlled way to stretch ring bands. The complete fixture includes a multi-stepped steel collet mandrel, a durable nylon base, and a precision-tapered steel expansion pin, allowing you to easily increase ring sizes with accuracy. To operate, simply place the ring onto the appropriate step of the mandrel, secure it on the base, and gently tap the tapered rod using a mallet or light hammer. This tool works effectively for most solid bands (metal rings without stones) and is ideal for resizing, repairing, or crafting rings in the shop. With 7 stepped positions, this tool accommodates U.S. ring sizes 8 to 16, offering versatility for jewelers working on a wide range of men’s and women’s bands. Proper care is recommended, especially when working with soldered rings or thinner shanks. This ring stretcher typically enlarges a band up to 1 full size and may require annealing for harder metals.

• Professional Rathburn-Style Ring Enlarger Tool – Designed for jewelers and metalworkers to safely and evenly stretch ring bands without distortion; ideal for jewelry repair, ring resizing, and metalworking applications.
• Multi-Stepped Steel Collet Mandrel (7 Steps) – Features seven precision-sized steps, each over 1/4" wide, allowing accurate placement for U.S. ring sizes 8 through 16, making it highly versatile for a wide range of rings.
• Tapered Steel Pin Expander for Controlled Stretching – Insert the tapered rod and gently tap with a mallet or hammer to expand the ring; provides a smooth, controlled enlargement that minimizes metal stress.
• Durable Nylon Base for Stability – Includes a sturdy base that keeps the fixture stable during use, ensuring safety and ease while stretching bands.
• Ideal for Solid Bands & Metal Rings – Recommended for plain bands without stones, stone-set fronts, or fragile solder joints; works best for gold, silver, brass, copper, and similar metals used in jewelry making.
• Safe, Accurate, and Easy to Use – Simple step-by-step operation makes it suitable for both professional jewelers and hobby metalworkers; typically enlarges rings up to one full finger size.