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The Busch 447AU Pavé Cut Carbide Twist Drill Assortment gives jewelers a versatile, time-saving set engineered specifically for pavé setting work. Each bur in this 9-piece collection combines a twist drill and a round bur into a single tool — pre-drilling and seat shaping happen in one pass, eliminating the need to switch tools mid-process. The result is improved precision, consistent stone seats, and a faster overall workflow.
All nine burs are manufactured from hot isostatically compressed finest-grain carbide, delivering exceptional hardness, wear resistance, and edge retention even under demanding use. Each bur is mounted on a 3/32" shank, compatible with standard flex shaft handpieces and rotary tools. The assortment spans 0.80mm through 1.60mm in 0.10mm increments, covering the most common pavé drilling requirements in a single purchase.
| Figure | 447AU |
|---|---|
| Material | Hot isostatically compressed finest-grain carbide |
| Shank Size | 3/32" |
| Size Range | 0.80mm–1.60mm |
| Size Increment | 0.10mm steps |
| Pieces per Set | 9 |
| Application | Pavé setting — pre-drilling and seat shaping |
One each of the following 447AU Pavé Cut Carbide Twist Drills:
These burs are also available for individual purchase. See part number BAU118.447AU for single-size ordering.
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