Expanding stainless steel ring mandrel for lathe and wood rings – Ringsupplies.com
Expanding Stainless Steel Ring Mandrel with Hex Allen Key - Heavy Duty Ring Shaper Tool for Ring Turning and Ring Making ( Ring Sizes 7.5-10.5 ) - Walmart.com
Proops Solid Steel Ring Mandrel with a GROOVE. Shaping, Forming Jewellery J1266 | eBay
MAN-255.00 - Steel Ring Mandrel, Round, 11-1/2 Inches
Hardened Steel Ring Sizer Mandrel Ring Stick 1-16 US Sizes - Findings Outlet
The Beadsmith Steel Ring Stick – 11.5 Inch Mandrel Sizer with Handle – Solid Steel, Smooth and Round – Tool for Enlarging, Forming and Shaping Rings - Walmart.com