ToolUSA Toolusa Jeweler's Deluxe Ring And Bracelet Mandrel With Nylon Hammer: KIT-PH2215 Mandrel Is 12 Inches Long And Measures Ring Sizes From 1 To 15 Made of quality hardened steel that protects it from damage, unlike the ones made of plastic 15 inch heavy duty round bracelet mandrel has hard chrome coating - graduated sizes from 1.5" - 3" Nylon hammer is perfect tool to work with metal rings because it prevents scratches Great for sizing, repairing, reshaping your rings and bracelets - a perfect combo!