{"product_id":"spearhead-hss-90-degree-setting-bur-master-kit-33-pieces-0-90-11-10mm","title":"Spearhead High Speed Steel 90 Degree Bearing Bur Master Kit of 33 Pieces","description":"\u003cp\u003e\u003cstrong\u003eImportant Notice: This set may ship incomplete.\u003c\/strong\u003e Due to ongoing supply constraints, Spearhead has been unable to fulfill all sizes in this kit as ordered. Otto Frei will contact you with the exact burs in stock, the sizes unavailable, and an updated reduced kit price at the time of your order. \u003cstrong\u003eWe are not back-ordering missing sizes, as restocking timelines are unknown and inventory returns randomly.\u003c\/strong\u003e For reference, as of 4\/17\/2025, 27 of the 33 sizes were available — actual stock will vary on your order date.\u003c\/p\u003e\n\n\u003cp\u003eSpearhead High Speed Steel (HSS) 90-degree setting burs are hand cut by expert craftsmen in the USA. Identifiable by the size stamped on each 3\/32\" shank, these burs offer superior hardness and longer service life compared to machine-cut Tungsten Vanadium Carbon Steel burs. HSS setting burs are the preferred choice of quality jewelers who demand consistent, precise seat cutting across a full range of stone sizes.\u003c\/p\u003e\n\n\u003cp\u003eThis master kit represents the complete Spearhead HSS 90-degree setting bur range — one bur per size — spanning 0.90 mm through 11.10 mm.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHand cut by expert craftsmen in the USA\u003c\/li\u003e\n\u003cli\u003eHigh Speed Steel (HSS) construction for superior hardness and edge retention\u003c\/li\u003e\n\u003cli\u003eLonger service life than machine-cut Tungsten Vanadium Carbon Steel burs\u003c\/li\u003e\n\u003cli\u003e90-degree included angle for precise stone seat cutting\u003c\/li\u003e\n\u003cli\u003eSize stamped on each 3\/32\" shank for easy identification\u003c\/li\u003e\n\u003cli\u003eCovers a wide metric size range: 0.90 mm – 11.10 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\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 Type\u003c\/th\u003e\n\u003ctd\u003e90-Degree Setting Bur\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\u003eCut Type\u003c\/th\u003e\n\u003ctd\u003eHand cut\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\u003eKit Quantity (full set)\u003c\/th\u003e\n\u003ctd\u003e33 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize Range\u003c\/th\u003e\n\u003ctd\u003e0.90 mm – 11.10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePart No.\u003c\/th\u003e\n\u003cth\u003eBur No.\u003c\/th\u003e\n\u003cth\u003eMetric Size\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.421\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e0.90 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.422\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e1.10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.423\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003e1.30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.424\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e1.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.425\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e1.70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.426\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e1.90 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.427\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e2.10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.428\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e2.30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.429\u003c\/td\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003e2.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.430\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e2.70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.431\u003c\/td\u003e\n\u003ctd\u003e11\u003c\/td\u003e\n\u003ctd\u003e2.90 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.432\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e3.10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.433\u003c\/td\u003e\n\u003ctd\u003e13\u003c\/td\u003e\n\u003ctd\u003e3.30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.434\u003c\/td\u003e\n\u003ctd\u003e14\u003c\/td\u003e\n\u003ctd\u003e3.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.435\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e3.80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.436\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003ctd\u003e4.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.437\u003c\/td\u003e\n\u003ctd\u003e17\u003c\/td\u003e\n\u003ctd\u003e4.30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.438\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.439\u003c\/td\u003e\n\u003ctd\u003e19\u003c\/td\u003e\n\u003ctd\u003e4.70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.440\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e5.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.442\u003c\/td\u003e\n\u003ctd\u003e22\u003c\/td\u003e\n\u003ctd\u003e5.20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.443\u003c\/td\u003e\n\u003ctd\u003e23\u003c\/td\u003e\n\u003ctd\u003e5.40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.444\u003c\/td\u003e\n\u003ctd\u003e24\u003c\/td\u003e\n\u003ctd\u003e5.60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.445\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e5.90 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.446\u003c\/td\u003e\n\u003ctd\u003e26\u003c\/td\u003e\n\u003ctd\u003e6.30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.447\u003c\/td\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003e6.70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.448\u003c\/td\u003e\n\u003ctd\u003e28\u003c\/td\u003e\n\u003ctd\u003e7.20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.449\u003c\/td\u003e\n\u003ctd\u003e29\u003c\/td\u003e\n\u003ctd\u003e7.60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.450\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e8.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.451\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e8.90 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.452\u003c\/td\u003e\n\u003ctd\u003e32\u003c\/td\u003e\n\u003ctd\u003e9.60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.453\u003c\/td\u003e\n\u003ctd\u003e33\u003c\/td\u003e\n\u003ctd\u003e10.40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e119.454\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e11.10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003eThis kit is currently subject to partial fulfillment only. Otto Frei will reach out after your order is placed to confirm available sizes and provide an adjusted price based on current inventory. Missing sizes are \u003cstrong\u003enot\u003c\/strong\u003e placed on back order.\u003c\/p\u003e","brand":"Spearhead","offers":[{"title":"Default Title","offer_id":43582581997782,"sku":"119.319","price":278.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/spearhead-high-speed-steel-90-degree-bearing-bur-master-kit-of-33-pieces-otto-frei.jpg?v=1719956967","url":"https:\/\/www.ottofrei.com\/products\/spearhead-hss-90-degree-setting-bur-master-kit-33-pieces-0-90-11-10mm","provider":"Otto Frei","version":"1.0","type":"link"}