GRS 004-735 Inside Diameter Ring Holder With 20 Mandrels

The GRS 004-735 Inside Diameter (ID) Ring Holder with 20 Mandrels is a significant upgrade over the original GRS ID Ring Holder, engineered to give jewelers, engravers, and stone setters unrestricted access to a ring's full circumference while holding it securely from the inside. The key advancement in this new design is the ability to choose between two distinct holding actions: adjustable tension or firm locking — a capability the original single-tension model did not offer.

Use the included standard cone for adjustable tension, allowing the ring to rotate smoothly during engraving. Switch to the locking cone to lock the ring completely rigid — ideal for pavé and standard stone setting where zero movement is essential. This versatility in a single tool body makes the GRS ID Ring Holder exceptionally adaptable across bench tasks.

This version includes 2 complete sets of 10 expanding mandrels (20 total), covering a wider size range than the original 7-collet set. Two mandrels of each size are provided, so you always have a backup at every diameter. The ring holder body is made of steel and mounts in a vise or engraving block. Not for use in a BenchMate. Made in the USA.

Features

• Holds rings from the inside, providing unrestricted access to the full circumference
• Choose between adjustable tension (standard cone) or rigid locking action (locking cone)
• Includes 20 expanding mandrels — 2 sets of 10, covering 13.5mm–22.5mm inside diameters
• New mandrel design covers a wider size range than the original 7-collet style
• Longer hex nut included for extending the ring mandrel when extra clearance is needed
• Steel body mounts in a vise or engraving block
• Suitable for engraving, pavé setting, and standard stone setting
• Not for use in a BenchMate
• Made in the USA

Specifications

What's Included

• Ring Holder Body (available separately as 104.754)
• 20 Expanding Mandrels — 2 each of the following sizes: 13.5mm, 14.5mm, 15.5mm, 16.5mm, 17.5mm, 18.5mm, 19.5mm, 20.5mm, 21.5mm, 22.5mm
• 2 Standard Cones
• 2 Locking Cones
• Drawbar
• Drawbar Knob
• Hex Nut (extended length for extra clearance)
• GRS Hex Wrench
• Instructions

Notes

The complete mandrel set (all red-listed parts) is available separately as GRS part 104.707. The ring holder body alone is available separately as GRS part 104.754.

California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.