Spearhead High Speed Steel (HSS) 90 degree bearing burs are hand cut by expert craftsmen in the USA and are a preferred choice of quality jewelers everywhere. Each bur in the Spearhead line features the size stamped directly on the 3/32" shank, making identification fast and reliable at the bench. Compared to imported Tungsten Vanadium Carbon Steel burs, these HSS burs are harder, stay sharper longer, and deliver extended service life—making them a smart investment for professional stone setting work.
This 14-piece kit spans from size No. 1 (0.90 mm) through size No. 28 (7.2 mm), giving you a comprehensive range of 90 degree setting burs to handle a wide variety of stone sizes in a single set.
Features
- High Speed Steel construction for superior hardness and extended shank life
- Hand cut in the USA by expert craftsmen
- 90 degree bearing angle for precise stone setting
- Size stamped on each 3/32" shank for quick identification
- Harder and longer-lasting than Tungsten Vanadium Carbon Steel alternatives
- 14-piece kit covers sizes 0.90 mm through 7.2 mm in a single purchase
Specifications
| Bur Type |
90 Degree Bearing (Setting) Bur |
| Material |
High Speed Steel (HSS) |
| Shank Size |
3/32" |
| Manufacture |
Hand cut in the USA |
| Kit Quantity |
14 pieces |
| Size Range |
0.90 mm – 7.2 mm (No. 1 – No. 28) |
What's Included
| Part # |
Size |
| 119.421 |
0.9 mm |
| 119.423 |
1.3 mm |
| 119.425 |
1.7 mm |
| 119.427 |
2.1 mm |
| 119.429 |
2.5 mm |
| 119.431 |
2.9 mm |
| 119.433 |
3.3 mm |
| 119.435 |
3.8 mm |
| 119.437 |
4.3 mm |
| 119.439 |
4.7 mm |
| 119.442 |
5.2 mm |
| 119.444 |
5.6 mm |
| 119.446 |
6.3 mm |
| 119.448 |
7.2 mm |