{"product_id":"busch-447au-pave-cut-carbide-twist-drill-assortment-9-piece-0-80mm-1-60mm-3-32-shank","title":"Busch 447AU Pave Cut Carbide Twist Drill Assortment of 9 On 3\/32\" Shanks 0.80mm-1.60mm","description":"\u003cp\u003eThe 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.\u003c\/p\u003e\u003cp\u003eAll 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.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-in-1 design:\u003c\/strong\u003e combines twist drill and round bur functions in a single tool\u003c\/li\u003e\n\u003cli\u003ePre-drilling and seat shaping completed in one step for greater efficiency\u003c\/li\u003e\n\u003cli\u003eManufactured from hot isostatically compressed finest-grain carbide\u003c\/li\u003e\n\u003cli\u003eEngineered specifically for pavé setting applications\u003c\/li\u003e\n\u003cli\u003eConsistent 0.10mm incremental sizing for precise stone-seat matching\u003c\/li\u003e\n\u003cli\u003eMounted on standard 3\/32\" shanks for broad handpiece compatibility\u003c\/li\u003e\n\u003cli\u003e9-piece assortment covers 0.80mm–1.60mm range\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eFigure\u003c\/th\u003e\n\u003ctd\u003e447AU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eHot isostatically compressed finest-grain carbide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShank Size\u003c\/th\u003e\n\u003ctd\u003e3\/32\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize Range\u003c\/th\u003e\n\u003ctd\u003e0.80mm–1.60mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize Increment\u003c\/th\u003e\n\u003ctd\u003e0.10mm steps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePieces per Set\u003c\/th\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003ePavé setting — pre-drilling and seat shaping\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cp\u003eOne each of the following 447AU Pavé Cut Carbide Twist Drills:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBAU118.448 — \u003cstrong\u003e0.80mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.449 — \u003cstrong\u003e0.90mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.450 — \u003cstrong\u003e1.00mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.451 — \u003cstrong\u003e1.10mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.452 — \u003cstrong\u003e1.20mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.453 — \u003cstrong\u003e1.30mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.454 — \u003cstrong\u003e1.40mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.455 — \u003cstrong\u003e1.50mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.456 — \u003cstrong\u003e1.60mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eThese burs are also available for individual purchase. See part number \u003cstrong\u003eBAU118.447AU\u003c\/strong\u003e for single-size ordering.\u003c\/p\u003e","brand":"Busch Burs","offers":[{"title":"Default Title","offer_id":43584555253974,"sku":"BAU118.460","price":275.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/busch-447au-pave-cut-carbide-twist-drill-assortment-of-9-on-332-shanks-0-80mm-1-60mm-otto-frei.jpg?v=1719956095","url":"https:\/\/www.ottofrei.com\/products\/busch-447au-pave-cut-carbide-twist-drill-assortment-9-piece-0-80mm-1-60mm-3-32-shank","provider":"Otto Frei","version":"1.0","type":"link"}