Ring Stretcher-Rathburn Stone Setting Tools Cured Ceramit achieves a hardness

Cured Ceramit achieves a hardness of 60–75 on the Sward scale

These long-lasting resin-bonded diamond grinding wheels are mounted on 3/32" shanks and designed for use with micromotors or flex shaft handpieces

5 mm (base of largest) Smallest Broach Length 66 mm (2-5/8") — Stubs #70 Largest Broach Length 150 mm (5-7/8") — Stubs #15 Material High-quality tempered steel Broach Diameter Ranges

The wheels will wear down gradually under normal use — rapid wear is an indication of excessive pressure or attempting to reach recessed areas beyond the brush's capabilities

bright viewing with a large field of view and edge-to-edge distortion-free imaging

Ring Stretcher-Rathburn Stone Setting Tools Cured Ceramit achieves a hardnessThe Rathburn Ring Stretcher offers a simple, effective method for enlarging plain wedding bands without the need for complex equipment. Designed for basic, unadorned bands, this stretcher is not suitable for stone set rings. Before use, always inspect the band for previous solder welds, as weakened seams may break under the pressure required to stretch the metal. To use, place the ring onto the stretcher and insert the tapered component. Gentle