{"product_id":"spearhead-hss-45-degree-hart-burs-1-10mm-11-10mm","title":"High Speed Steel 45-Degree Bearing Burs 1.10mm-11.10mm","description":"\u003cp\u003e\u003cstrong\u003eSpearhead High Speed Steel (HSS) 45° Hart Burs\u003c\/strong\u003e are precision hand-cut in the USA by expert craftsmen. Known for their exceptional sharpness, durability, and consistency, these burs are the professional jeweler's choice for stone setting and precision metalwork.\u003c\/p\u003e\u003cp\u003eEach Spearhead bur is stamped with its size on the \u003cstrong\u003e3\/32\" (2.35 mm) shank\u003c\/strong\u003e for quick identification. Made from premium HSS, they maintain a sharper edge longer and resist heat buildup better than imported tungsten vanadium burs, ensuring smoother, cleaner cuts and extended tool life.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMade in the USA by skilled craftsmen\u003c\/li\u003e\n\u003cli\u003e45° hart profile for precision stone seat cutting\u003c\/li\u003e\n\u003cli\u003eHigh Speed Steel for superior hardness and edge retention\u003c\/li\u003e\n\u003cli\u003eHand-cut flutes for smoother operation and reduced chatter\u003c\/li\u003e\n\u003cli\u003eSize permanently stamped on each 3\/32\" shank\u003c\/li\u003e\n\u003cli\u003eSold individually by size\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eHigh Speed Steel (HSS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBur Profile\u003c\/th\u003e\n\u003ctd\u003e45° Hart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShank Diameter\u003c\/th\u003e\n\u003ctd\u003e3\/32\" (2.35 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize Range\u003c\/th\u003e\n\u003ctd\u003e1.10 mm – 11.10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold As\u003c\/th\u003e\n\u003ctd\u003eIndividually, by size\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eAvailable Options\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePart #\u003c\/th\u003e\n\u003cth\u003eBur Size\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.382\u003c\/td\u003e\n\u003ctd\u003e1.10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.383\u003c\/td\u003e\n\u003ctd\u003e1.30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.384\u003c\/td\u003e\n\u003ctd\u003e1.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.385\u003c\/td\u003e\n\u003ctd\u003e1.70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.386\u003c\/td\u003e\n\u003ctd\u003e1.90 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.387\u003c\/td\u003e\n\u003ctd\u003e2.10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.388\u003c\/td\u003e\n\u003ctd\u003e2.30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.389\u003c\/td\u003e\n\u003ctd\u003e2.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.390\u003c\/td\u003e\n\u003ctd\u003e2.70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.391\u003c\/td\u003e\n\u003ctd\u003e2.90 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.392\u003c\/td\u003e\n\u003ctd\u003e3.10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.393\u003c\/td\u003e\n\u003ctd\u003e3.30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.394\u003c\/td\u003e\n\u003ctd\u003e3.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.395\u003c\/td\u003e\n\u003ctd\u003e3.80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.396\u003c\/td\u003e\n\u003ctd\u003e4.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.397\u003c\/td\u003e\n\u003ctd\u003e4.30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.398\u003c\/td\u003e\n\u003ctd\u003e4.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.399\u003c\/td\u003e\n\u003ctd\u003e4.70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.400\u003c\/td\u003e\n\u003ctd\u003e5.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.402\u003c\/td\u003e\n\u003ctd\u003e5.20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.404\u003c\/td\u003e\n\u003ctd\u003e5.60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.406\u003c\/td\u003e\n\u003ctd\u003e6.30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.408\u003c\/td\u003e\n\u003ctd\u003e7.20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.410\u003c\/td\u003e\n\u003ctd\u003e8.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.414\u003c\/td\u003e\n\u003ctd\u003e11.10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eFor best results, operate at moderate speed and use proper lubrication to extend bur life. Compatible with flex shafts and micromotors accepting a 3\/32\" shank.\u003c\/p\u003e","brand":"Spearhead","offers":[{"title":"1.10mm","offer_id":43696770089174,"sku":"119.382","price":5.35,"currency_code":"USD","in_stock":false},{"title":"1.30mm","offer_id":43696770121942,"sku":"119.383","price":5.35,"currency_code":"USD","in_stock":true},{"title":"1.50mm","offer_id":43696770154710,"sku":"119.384","price":5.35,"currency_code":"USD","in_stock":false},{"title":"1.70mm","offer_id":43696770187478,"sku":"119.385","price":5.35,"currency_code":"USD","in_stock":true},{"title":"1.90mm","offer_id":43696770220246,"sku":"119.386","price":5.35,"currency_code":"USD","in_stock":true},{"title":"2.10mm","offer_id":43696770253014,"sku":"119.387","price":5.35,"currency_code":"USD","in_stock":true},{"title":"2.30mm","offer_id":43696770285782,"sku":"119.388","price":5.35,"currency_code":"USD","in_stock":true},{"title":"2.50mm","offer_id":43696770318550,"sku":"119.389","price":6.8,"currency_code":"USD","in_stock":true},{"title":"2.70mm","offer_id":43696770351318,"sku":"119.390","price":6.8,"currency_code":"USD","in_stock":false},{"title":"2.90mm","offer_id":43696770384086,"sku":"119.391","price":6.8,"currency_code":"USD","in_stock":true},{"title":"3.10mm","offer_id":43696770416854,"sku":"119.392","price":6.8,"currency_code":"USD","in_stock":true},{"title":"3.30mm","offer_id":43696770449622,"sku":"119.393","price":8.25,"currency_code":"USD","in_stock":true},{"title":"3.50mm","offer_id":43696770482390,"sku":"119.394","price":8.25,"currency_code":"USD","in_stock":true},{"title":"3.80mm","offer_id":43696770515158,"sku":"119.395","price":8.25,"currency_code":"USD","in_stock":true},{"title":"4.00mm","offer_id":43696770547926,"sku":"119.396","price":8.25,"currency_code":"USD","in_stock":false},{"title":"4.30mm","offer_id":43696770580694,"sku":"119.397","price":8.25,"currency_code":"USD","in_stock":true},{"title":"4.50mm","offer_id":43696770613462,"sku":"119.398","price":8.25,"currency_code":"USD","in_stock":false},{"title":"4.70mm","offer_id":43696770646230,"sku":"119.399","price":9.3,"currency_code":"USD","in_stock":true},{"title":"5.00mm","offer_id":43696770678998,"sku":"119.400","price":9.3,"currency_code":"USD","in_stock":true},{"title":"5.20mm","offer_id":43696770711766,"sku":"119.402","price":9.3,"currency_code":"USD","in_stock":true},{"title":"5.60mm","offer_id":43696770744534,"sku":"119.404","price":9.3,"currency_code":"USD","in_stock":true},{"title":"6.30mm","offer_id":43696770777302,"sku":"119.406","price":9.75,"currency_code":"USD","in_stock":false},{"title":"7.20mm","offer_id":43696770810070,"sku":"119.408","price":9.75,"currency_code":"USD","in_stock":false},{"title":"8.00mm","offer_id":43696770842838,"sku":"119.410","price":9.75,"currency_code":"USD","in_stock":false},{"title":"11.10mm","offer_id":43696770875606,"sku":"119.414","price":12.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/high-speed-steel-45-degree-bearing-burs-1-10mm-11-10mm-otto-frei.jpg?v=1719955428","url":"https:\/\/www.ottofrei.com\/products\/spearhead-hss-45-degree-hart-burs-1-10mm-11-10mm","provider":"Otto Frei","version":"1.0","type":"link"}