{"id":9680937877655,"title":"Mibro | 13 Piece Cobalt Tri-Bore Drill Bit Set","handle":"mibro-13-piece-cobalt-tri-bore-drill-bit-set","description":"\u003ch3\u003eMibro | 13 Piece Cobalt Tri-Bore Drill Bit Set\u003c\/h3\u003e\n\u003cp id=\"b\"\u003eSet of 13 premium cobalt Tri-Bore drill bits made with M35 steel containing 5%\ncobalt for superior strength and heat resistance. Their third cutting edge\nincreases the cutting surface area allowing for 17% faster cutting while\nreducing heat buildup and wear to improve service life up to three times\nlonger than standard cobalt drill bits. The third cutting edge starts on drill\nbits with 1\/8 in (3 mm) diameter and larger. MIBRO Tri-Bore cobalt drill bits\nfully ground manufacturing ensures straighter, more precise holes. A thicker\ncore increases the drill bits' rigidity and strength. These drill bits are\nsuitable for the heaviest and most demanding user for drilling in all ferrous\nand nonferrous metals, including hard steels like stainless steel. For a sure\ngrip, all sizes 3\/16 in (4.76 mm) in diameter and larger have three flats on\nthe bit's shank. Their 135° split-point tip geometry on all bits 1\/8 in (3 mm)\nin diameter and larger eliminates the need for a center punch and keeps the\ndrill from \"walking\" on hard surfaces.\u003c\/p\u003e \n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n \u003cul class=\"a\"\u003e\n \u003cli\u003eSuitable for the heaviest and most demanding user, for drilling in all ferrous and nonferrous metals, including hard steels like stainless steel\u003c\/li\u003e\n \u003cli\u003eMade with M35 steel containing 5% cobalt for superior strength and heat resistance\u003c\/li\u003e\n \u003cli\u003eMaterial: Cobalt\u003c\/li\u003e\n \u003cli\u003ePack of: 13 | Included Drill Bits: 1\/16 in (1.59 mm), 5\/64 in (1.98 mm), 3\/32 in (2.38 mm), 7\/64 in (2.78 mm), 1\/8 in (3.18 mm), 9\/64 in (3.57 mm), 5\/32 in (3.97 mm), 11\/64 in (4.37 mm), 3\/16 in (4.76 mm), 13\/64 in (5.16 mm), 7\/32 in (5.56 mm), 15\/64 in (5.95 mm), 1\/4 in (6.35 mm)\u003c\/li\u003e\n \u003c\/ul\u003e","published_at":"2026-07-30T19:11:00+10:00","created_at":"2026-07-26T20:14:11+10:00","vendor":"Mibro","type":"Jobber Drill Bits","tags":["home_improvement_Aug2026"],"price":19600,"price_min":19600,"price_max":19600,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":48068144693399,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"B09GS9ZCQS","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Mibro | 13 Piece Cobalt Tri-Bore Drill Bit Set","public_title":null,"options":["Default Title"],"price":19600,"weight":159,"compare_at_price":null,"inventory_management":"shopify","barcode":"066366499537","requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/newnestshop.com\/cdn\/shop\/files\/B09GS9ZCQS.jpg?v=1785060853","\/\/newnestshop.com\/cdn\/shop\/files\/71Di0oCMJyL.jpg?v=1785060853","\/\/newnestshop.com\/cdn\/shop\/files\/61y1pThSAcL.jpg?v=1785060853"],"featured_image":"\/\/newnestshop.com\/cdn\/shop\/files\/B09GS9ZCQS.jpg?v=1785060853","options":["Title"],"media":[{"alt":null,"id":42456208408727,"position":1,"preview_image":{"aspect_ratio":0.517,"height":1934,"width":1000,"src":"\/\/newnestshop.com\/cdn\/shop\/files\/B09GS9ZCQS.jpg?v=1785060853"},"aspect_ratio":0.517,"height":1934,"media_type":"image","src":"\/\/newnestshop.com\/cdn\/shop\/files\/B09GS9ZCQS.jpg?v=1785060853","width":1000},{"alt":null,"id":42456208441495,"position":2,"preview_image":{"aspect_ratio":0.671,"height":1920,"width":1288,"src":"\/\/newnestshop.com\/cdn\/shop\/files\/71Di0oCMJyL.jpg?v=1785060853"},"aspect_ratio":0.671,"height":1920,"media_type":"image","src":"\/\/newnestshop.com\/cdn\/shop\/files\/71Di0oCMJyL.jpg?v=1785060853","width":1288},{"alt":null,"id":42456208474263,"position":3,"preview_image":{"aspect_ratio":1.191,"height":1137,"width":1354,"src":"\/\/newnestshop.com\/cdn\/shop\/files\/61y1pThSAcL.jpg?v=1785060853"},"aspect_ratio":1.191,"height":1137,"media_type":"image","src":"\/\/newnestshop.com\/cdn\/shop\/files\/61y1pThSAcL.jpg?v=1785060853","width":1354}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch3\u003eMibro | 13 Piece Cobalt Tri-Bore Drill Bit Set\u003c\/h3\u003e\n\u003cp id=\"b\"\u003eSet of 13 premium cobalt Tri-Bore drill bits made with M35 steel containing 5%\ncobalt for superior strength and heat resistance. Their third cutting edge\nincreases the cutting surface area allowing for 17% faster cutting while\nreducing heat buildup and wear to improve service life up to three times\nlonger than standard cobalt drill bits. The third cutting edge starts on drill\nbits with 1\/8 in (3 mm) diameter and larger. MIBRO Tri-Bore cobalt drill bits\nfully ground manufacturing ensures straighter, more precise holes. A thicker\ncore increases the drill bits' rigidity and strength. These drill bits are\nsuitable for the heaviest and most demanding user for drilling in all ferrous\nand nonferrous metals, including hard steels like stainless steel. For a sure\ngrip, all sizes 3\/16 in (4.76 mm) in diameter and larger have three flats on\nthe bit's shank. Their 135° split-point tip geometry on all bits 1\/8 in (3 mm)\nin diameter and larger eliminates the need for a center punch and keeps the\ndrill from \"walking\" on hard surfaces.\u003c\/p\u003e \n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n \u003cul class=\"a\"\u003e\n \u003cli\u003eSuitable for the heaviest and most demanding user, for drilling in all ferrous and nonferrous metals, including hard steels like stainless steel\u003c\/li\u003e\n \u003cli\u003eMade with M35 steel containing 5% cobalt for superior strength and heat resistance\u003c\/li\u003e\n \u003cli\u003eMaterial: Cobalt\u003c\/li\u003e\n \u003cli\u003ePack of: 13 | Included Drill Bits: 1\/16 in (1.59 mm), 5\/64 in (1.98 mm), 3\/32 in (2.38 mm), 7\/64 in (2.78 mm), 1\/8 in (3.18 mm), 9\/64 in (3.57 mm), 5\/32 in (3.97 mm), 11\/64 in (4.37 mm), 3\/16 in (4.76 mm), 13\/64 in (5.16 mm), 7\/32 in (5.56 mm), 15\/64 in (5.95 mm), 1\/4 in (6.35 mm)\u003c\/li\u003e\n \u003c\/ul\u003e"}