After ring is placed on stretcher and tapered part is inserted, gentle tapping with mandrel causes ring to expand. Inexpensive, but effective. For ring sizes # 5 or larger.
Rathburn Ring Stretcher Wedding Band Sizing Stretching Mandrel Jewelry Tools - Helia Beer Co
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The Rathburn Ring Stretcher can quickly enlarge rings. It is an easy to use yet economical tool. A simple tap on the end of the tool using a rawhide
Rathburn Ring Stretcher Enlarger Tool
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How to Use the Rathburn Ring Stretcher
How to Use the Rathburn Ring Stretcher
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RATHBURN RING STRETCHER, HOW TO STRETCH RINGS USING RATHBURN RING STRETCHER