Steel Ring Mandrel Graduated In USA sizes 1 To 15 By 1/4 Size-No Groove

A reliable workhorse for the bench, this hardened steel ring mandrel is graduated in USA sizes from 1 to 15 in 1/4-size increments — no groove. Otto Frei sourced this mandrel after testing multiple mid-priced options and found it to be the best of the group: accurately sized, properly hardened, and produced on modern CNC machinery. It is an excellent choice for beginners, students, and working jewelers who need a dependable mandrel at a practical price point.

Manufactured in India by the same factory that produces mandrels sold under major jewelry tool brand names, this mandrel is made on German CNC equipment — a detail that speaks directly to the consistency of its graduation marks and the quality of its taper.

Features

• Graduated in USA ring sizes 1 through 15 in 1/4-size steps
• No groove — clean, uninterrupted taper surface
• Properly hardened steel for durability and accurate sizing
• Produced on German CNC machinery for consistent graduation accuracy
• Recommended for beginners, students, and everyday bench use
• Otto Frei tested and selected as the best mid-priced ring mandrel

Specifications