GRS Inside Ring Mandrel – Secure Interior Ring Holding for Engraving, Stone Setting & Jewelry Fabrication The GRS Inside Ring Mandrel (004-589) is a specialized workholding attachment designed for the GRS BenchMate® System, allowing jewelers, engravers, and stone setters to securely hold rings from the inside while maintaining maximum access to the exterior surface. By gripping internally, this innovative ring holder helps prevent ring distortion and provides a stable platform for detailed engraving, setting, polishing, and finishing operations. Unlike traditional external clamps that may obstruct the outside of a ring, the Inside Ring Mandrel expands inside the ring to provide secure support while keeping the outer surface accessible. The collet system helps protect finished surfaces by distributing holding pressure internally, making it ideal for working on delicate or highly finished jewelry pieces. Designed for professional jewelry applications, the GRS Inside Ring Mandrel installs directly onto a GRS BenchMate® and provides improved control for ring engraving, channel setting, bead setting, bezel setting, polishing, and other precision operations. Features & Benefits Adds inside ring-holding capability to the GRS BenchMate® System Securely grips rings from the interior for improved outside access Helps prevent rings from flexing during detailed work Collet design helps minimize marking or scratching finished surfaces Provides better visibility and access for engraving and stone setting Ideal for channel, bead, and bezel setting applications Allows comfortable positioning of rings for precision bench work Durable steel construction built for professional use Made by GRS for jewelers, engravers, and stone setters Specifications Brand: GRS Product: Inside Ring Mandrel SKU: 004-589 MPN: 004-589 UPC: 196943900719 Compatible With: GRS BenchMate® System Weight: Approximately 2.4 lbs Material: Steel body with interchangeable collets Application: Interior ring holding for engraving and jewelry fabrication Country of Origin: USA Package Includes Inside Ring Mandrel body Collet set Expansion hardware Adjustment components Wrench Ideal Applications Ring engraving Diamond setting Pavé setting Channel setting Bezel setting Jewelry repair Ring polishing Fine finishing Custom jewelry fabrication Professional bench jewelry work Frequently Asked Questions Q: What is the GRS Inside Ring Mandrel used for?A: It is designed to securely hold rings from the inside when mounted to a GRS BenchMate®, allowing greater access to the outside of the ring for engraving, setting, and finishing work. Q: Does this hold rings externally like a traditional clamp?A: No. The Inside Ring Mandrel expands inside the ring, leaving the outer surface more accessible and reducing interference while working. Q: Can it be used for stone setting?A: Yes. The improved access and stability make it especially useful for channel, bead, and bezel setting applications. Q: Is the BenchMate included?A: No. This listing is for the Inside Ring Mandrel attachment only. A compatible GRS BenchMate® system is required for use. Q: What ring sizes can it hold?A: The included collet system accommodates a range of common ring sizes. Additional replacement collets are available separately for expanded sizing options. SKU: 004-589 UPC: 196943900689 Brand: GRS MPN: 004-589 Made In: United States Micro-Tools makes every attempt to provide accurate information for each item. Actual packaging and/or specifications may be slightly different from the information and picture provided. I068G
