This 17-piece kit brings together Swiss-made Tungsten Vanadium 90° Hart Burs in a comprehensive size range — from 0.90mm through 4.00mm — purpose-built for prong and channel stone setting. Each bur is machine-made to ultra-high precision tolerances, delivering smooth, clean cuts in precious metal with no chatter or drag.
Tungsten Vanadium steel burs are the most widely used burs in the jewelry industry. Unlike High Speed Steel (HSS) burs, which are individually hand-cut and vary from piece to piece, Tungsten Vanadium burs are uniformly consistent in geometry and performance. While HSS burs offer greater long-term durability, Tungsten Vanadium burs provide exceptional precision at a lower cost — making them the preferred choice for everyday bench work.
This kit is assembled from Otto Frei Swiss burs, produced on the most modern equipment available and hardened using Swiss steel know-how — making this line a top seller at Otto Frei. All burs feature a 3/32" diameter shank and arrive organized in a round plastic holder for easy bench access.
| Bur Type | 90° Hart Bur |
|---|---|
| Material | Tungsten Vanadium Steel |
| Origin | Swiss Made |
| Shank Diameter | 3/32" |
| Piece Count | 17 burs + 1 round plastic holder |
| Size Range | 0.90mm – 4.00mm |
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