{"product_id":"busch-fig-446au-carbide-70-degree-hart-burs-3-32-shank-0-90-2-30mm-set-15","title":"Busch Fig 446AU Carbide 70 Degree Hart Burs on 3\/32\" Shanks-Set of 15 .90mm-2.30mm","description":"\u003cp\u003eThe Busch Fig 446AU Carbide 70 Degree Hart Burs are precision-engineered tools designed specifically for cutting seats in prongs. This complete kit includes 15 burs in a plastic storage box, covering sizes from 0.90mm through 2.30mm in 0.10mm increments — giving jewelers and stone setters the full range needed for consistent, accurate prong seat work.\u003c\/p\u003e\n\n\u003cp\u003eCarbide burs are the longest-lasting burs available, outlasting both tungsten vanadium and high-speed steel burs. They perform exceptionally on the toughest metals — including platinum, titanium, and steel — while also delivering dramatically extended service life on standard gold alloys. Their advanced blade geometry, typically found only on steel tools, is achieved through state-of-the-art manufacturing in Germany.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e70-degree hart bur geometry engineered for precise prong seat cutting\u003c\/li\u003e\n\u003cli\u003eCarbide construction outlasts tungsten vanadium and high-speed steel burs\u003c\/li\u003e\n\u003cli\u003eSuitable for platinum, titanium, steel, and all standard gold alloys\u003c\/li\u003e\n\u003cli\u003eAdvanced blade geometry normally reserved for steel tooling\u003c\/li\u003e\n\u003cli\u003eManufactured in Germany using state-of-the-art production techniques\u003c\/li\u003e\n\u003cli\u003eComplete set of 15 burs stored in a plastic box for organized access\u003c\/li\u003e\n\u003cli\u003eAlso available individually by the piece\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eFigure\u003c\/th\u003e\n\u003ctd\u003e446AU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBur Type\u003c\/th\u003e\n\u003ctd\u003eHart (70 Degree)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eCarbide\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\u003e0.90mm – 2.30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKit Quantity\u003c\/th\u003e\n\u003ctd\u003e15 burs (one per size)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Speed\u003c\/th\u003e\n\u003ctd\u003e2,000 – 10,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eGermany\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStorage\u003c\/th\u003e\n\u003ctd\u003ePlastic box included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBAU118.609 — \u003cstrong\u003e0.90mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.610 — \u003cstrong\u003e1.00mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.611 — \u003cstrong\u003e1.10mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.612 — \u003cstrong\u003e1.20mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.613 — \u003cstrong\u003e1.30mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.614 — \u003cstrong\u003e1.40mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.615 — \u003cstrong\u003e1.50mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.616 — \u003cstrong\u003e1.60mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.617 — \u003cstrong\u003e1.70mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.618 — \u003cstrong\u003e1.80mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.619 — \u003cstrong\u003e1.90mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.620 — \u003cstrong\u003e2.00mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.621 — \u003cstrong\u003e2.10mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.622 — \u003cstrong\u003e2.20mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBAU118.623 — \u003cstrong\u003e2.30mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003eRelated Busch carbide bur sets are also available: Fig 414AU 90-degree hart burs (part number BAU118.500) and Fig 413AU traditional setting burs (part number BAU118.835). All individual sizes from this kit are also sold separately.\u003c\/p\u003e","brand":"Busch Burs","offers":[{"title":"Default Title","offer_id":43582813634774,"sku":"BAU118.600","price":298.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/busch-fig-446au-carbide-70-degree-hart-burs-on-332-shanks-set-of-15-90mm-2-30mm-otto-frei.jpg?v=1719956845","url":"https:\/\/www.ottofrei.com\/products\/busch-fig-446au-carbide-70-degree-hart-burs-3-32-shank-0-90-2-30mm-set-15","provider":"Otto Frei","version":"1.0","type":"link"}