Amazon.com: Steel Ring Mandrel: Size 1-15 US : Arts, Crafts & Sewing
Amazon.com: Expanding Ring Mandrel with Hex Allen Key – Medium Size Steel Ring Mandrel for Lathe – Heavy Duty Ring Shaper Tool for Ring Turning and Ring Making - Ring Sizes(7.5-10.5) -
Economy Grooved & Graduated Ring Mandrel | Contenti