| Total qty | Discount | Per unit | You save |
|---|---|---|---|
| 1 | — | — | |
| 2 – 3 | 5% off | ||
| 4 – 11 | 7% off | ||
| 12 + | 10% off |
Busch burs are the most trusted name in jewelers' burs, and the Busch 1772SS12 Fig. 77B Concave Cup Bur Kit of 12 delivers a carefully selected range of the most popular sizes in one convenient set. Cup burs are an essential tool for finishing the tips of prongs — the number one application for cup burs in jewelry work — and this kit makes it easy to have the right size on hand for a wide variety of settings and stone sizes.
Concave refers to the traditional cup bur shape, which leaves a smooth, rounded top on a prong after finishing. This classic profile has been the standard for jewelers for generations, providing clean, consistent results. Note that a separate concave cone shape is also available from Busch in their Fig. 411C and Fig. 411CT cup burs.
Each bur in this kit is crafted from tungsten vanadium steel and manufactured in Germany to ultra-high precision tolerances, ensuring reliable performance and long service life across professional bench applications.
| Model | 1772SS12 |
|---|---|
| Figure | 77B Concave Cup |
| Size Range | 0.80mm–1.90mm |
| Kit Quantity | 12 burs (one per size) |
| Material | Tungsten vanadium steel |
| Country of Origin | Germany |
The concave cup bur shape (Fig. 77B) leaves a rounded top on prong tips. For a concave cone profile, see Busch Fig. 411C and Fig. 411CT cup burs, available separately.
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