| Total qty | Discount | Per unit | You save |
|---|---|---|---|
| 1 | – | – | |
| 2 – 3 | 5% off | ||
| 4 – 11 | 7% off | ||
| 12 + | 10% off |
A 90-degree setting bur cuts the bearing seat a stone drops into, so the girdle sits level and fully supported before the metal is closed over it, and this master kit carries one bur in every size the range offers.
Important Notice: This set will ship incomplete. Due to ongoing supply constraints, Spearhead has been unable to fulfill all sizes in this kit as ordered. Otto Frei will contact you with the exact burs in stock, the sizes unavailable, and an updated reduced kit price at the time of your order. We are not back-ordering missing sizes, as restocking timelines are unknown and inventory returns randomly. For reference, as of 7/29/2026, 25 of the 33 sizes were available. Actual stock will vary on your order date.
Spearhead High Speed Steel (HSS) 90-degree setting burs are hand cut by expert craftsmen in the USA. Identifiable by the size stamped on each 3/32" shank, these burs offer superior hardness and longer service life compared to machine-cut Tungsten Vanadium Carbon Steel burs. HSS setting burs are the preferred choice of quality jewelers who demand consistent, precise seat cutting across a full range of stone sizes.
This master kit represents the complete Spearhead HSS 90-degree setting bur range, one bur per size, spanning 0.90 mm through 11.10 mm.
| Part No. | Bur No. | Metric Size |
|---|---|---|
| 119.421 | 1 | 0.90 mm |
| 119.422 | 2 | 1.10 mm |
| 119.423 | 3 | 1.30 mm |
| 119.424 | 4 | 1.50 mm |
| 119.425 | 5 | 1.70 mm |
| 119.426 | 6 | 1.90 mm |
| 119.427 | 7 | 2.10 mm |
| 119.428 | 8 | 2.30 mm |
| 119.429 | 9 | 2.50 mm |
| 119.430 | 10 | 2.70 mm |
| 119.431 | 11 | 2.90 mm |
| 119.432 | 12 | 3.10 mm |
| 119.433 | 13 | 3.30 mm |
| 119.434 | 14 | 3.50 mm |
| 119.435 | 15 | 3.80 mm |
| 119.436 | 16 | 4.00 mm |
| 119.437 | 17 | 4.30 mm |
| 119.438 | 18 | 4.50 mm |
| 119.439 | 19 | 4.70 mm |
| 119.440 | 20 | 5.00 mm |
| 119.442 | 22 | 5.20 mm |
| 119.443 | 23 | 5.40 mm |
| 119.444 | 24 | 5.60 mm |
| 119.445 | 25 | 5.90 mm |
| 119.446 | 26 | 6.30 mm |
| 119.447 | 27 | 6.70 mm |
| 119.448 | 28 | 7.20 mm |
| 119.449 | 29 | 7.60 mm |
| 119.450 | 30 | 8.00 mm |
| 119.451 | 31 | 8.90 mm |
| 119.452 | 32 | 9.60 mm |
| 119.453 | 33 | 10.40 mm |
| 119.454 | 34 | 11.10 mm |
This kit is currently subject to partial fulfillment only. Otto Frei will reach out after your order is placed to confirm available sizes and provide an adjusted price based on current inventory. Missing sizes are not placed on back order.
California Prop 65 Warning:No reviews yet. Be the first to share your experience with this product.
Write a review ↓