Durston® Ring Stretcher Mandrels – Set of 3

Resize and enlarge ring bands with precision, speed, and complete metal surface protection. The Durston® Ring Stretcher Mandrels Set features three expanding stepped collet mandrels covering a wide ring diameter range from 14 mm to 24 mm. Engineered with classic Durston® precision, each mandrel expands uniformly via an internal hex bolt driven by the included Allen key, ensuring accurate ring sizing without distortion or marring.

Why Choose the Durston® Ring Stretcher Mandrel Set

• Comprehensive 3-Piece Expansion Set: Includes small, medium, and large expanding mandrels to cover virtually all standard ring sizes across a 14 mm to 24 mm diameter spectrum.

• Controlled Allen Key Expansion: Simply slide the ring over the appropriate stepped section and turn the center bolt with the included hex wrench to expand the collet smoothly and evenly.

• Versatile Bench & Motor Mounting: Cylindrical shank design mounts easily into a bench vice or clamp, and can be integrated with lathe chucks or polishing motors for powered operations.

• Compact & Portable Professional Tooling: Space-saving form factor is ideal for mobile jewelers, trade show repair stations, and compact workshop benches.

• Durston® Engineering Precision: Machined from high-grade steel to deliver uniform radial pressure, protecting precious metal bands against stress fractures and uneven stretching.

Technical Specifications & Size Matrix

Brand Authority	Durston® Tools
Product Name	Durston® Ring Stretcher Mandrels – Set of 3
Associated Model Numbers	#2125, #2126, #2127, #2124
Small Mandrel Range	14 mm – 17 mm Ring Diameter
Medium Mandrel Range	17.5 mm – 20.5 mm Ring Diameter
Large Mandrel Range	21 mm – 24 mm Ring Diameter
Total Mandrel Length	92 mm