{"product_id":"intoo-hss-cobalt-drill-bits-set-21pcs-triangle-shank-durable-metal","title":"INTOO Hss Cobalt Drill Bits Set 21PCS Triangle Shank - Durable Metal","description":"\u003cp\u003eIn this review the INTOO Hss Cobalt Drill Bits Set aims at metalworkers and hobbyists who need a durable, all-purpose set of drill bits for hard metals. The bottom line is that this 21-piece kit delivers strong cutting performance on stainless steel and other hard materials thanks to its 5% cobalt composition and patented Golden Ratio tip design, making it worth considering for anyone who drills metal regularly and wants longer bit life and cleaner holes.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003e21-piece range:\u003c\/strong\u003e The set includes a tight progression of sizes from 1\/16 to 3\/8 in so you can select the right diameter for both light and heavier drilling tasks.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eCobalt 5% material:\u003c\/strong\u003e The high-cobalt alloy increases wear resistance and stands up to heat when cutting stainless steel and other hard metals.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eGolden Ratio tip:\u003c\/strong\u003e From 5\/32 in and up the patented tip produces cleaner, smoother holes and is designed for longer service life in heavy-duty work.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eTriangle shank:\u003c\/strong\u003e The triangular shank provides a better grip in chucks that accept it, reducing slippage compared with round-shank bits.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eMetal storage box:\u003c\/strong\u003e The strong metal box keeps the bits organized and protected when transporting or storing the set.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis set is best for metalworkers, mechanics, and serious DIYers who frequently drill stainless steel or other hard metals and need a set that resists wear. Its range of sizes makes it useful for workshop projects where multiple hole diameters are required and the Golden Ratio tip helps with tougher materials.\u003c\/p\u003e\n\u003cp\u003eIt is less suitable for users who only occasionally drill soft wood or plastics and who prefer inexpensive, general-purpose bits; those users may not need the expense of a cobalt set. Also, if a keyed chuck is not available to control speed and torque, buyers should take care with drill speed to preserve bit life.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eDurable 5% cobalt alloy provides superior wear resistance when drilling hard metals.\u003c\/li\u003e\n \u003cli\u003ePatented Golden Ratio tip gives cleaner, smoother holes and longer life on heavy-duty jobs.\u003c\/li\u003e\n \u003cli\u003eComprehensive size range and triangle shank improve usability and reduce slippage.\u003c\/li\u003e\n \u003cli\u003eStrong metal storage box keeps bits organized and protected.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eSome users report dullness after use and occasional issues with bit retention in the case, so expect normal wear and check storage fit.\u003c\/li\u003e\n \u003cli\u003ePerformance depends on controlling drilling speed; higher RPMs will shorten tool life if not managed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n\u003ctd\u003eSet contents\u003c\/td\u003e\n\u003ctd\u003e21 pieces (sizes 1\/16 to 3\/8 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eSizes included\u003c\/td\u003e\n\u003ctd\u003e1\/16, 5\/64, 3\/32, 7\/64, 1\/8, 9\/64, 5\/32, 11\/64, 3\/16, 13\/64, 7\/32, 15\/64, 1\/4, 17\/64, 9\/32, 19\/64, 5\/16, 21\/64, 11\/32, 32\/64, 3\/8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHSS with 5% cobalt\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eTip design\u003c\/td\u003e\n\u003ctd\u003ePatented Golden Ratio tip (from 5\/32 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eShank type\u003c\/td\u003e\n\u003ctd\u003eTriangle shank\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eStrong metal box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe INTOO Hss Cobalt 21-piece set is a solid choice for anyone who needs reliable drill bits for stainless steel and other hard metals; the 5% cobalt and Golden Ratio tip improve durability and hole quality, and the triangle shank reduces slippage. For metal-focused workshops this set offers good value, provided users control drill speed and accept that bits will need replacement over long-term heavy use.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these bits suitable for stainless steel?\u003c\/strong\u003e\u003cbr\u003eYes, the 5% cobalt composition and Golden Ratio tip are intended for cutting hard metals including stainless steel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat sizes are included?\u003c\/strong\u003e\u003cbr\u003eThe kit contains 21 sizes from 1\/16 in up to 3\/8 in, covering common drill diameters for metalworking.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow should I extend bit life?\u003c\/strong\u003e\u003cbr\u003eUse low RPM when drilling hard metals and apply steady pressure; the manufacturer notes lower speed can extend life significantly.\u003c\/p\u003e","brand":"INTOO","offers":[{"title":"Default Title","offer_id":48634178437339,"sku":"B09CYL9DMW","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71tgIXiD9zL._AC_SL1500.jpg?v=1778467634","url":"https:\/\/gearmusthave.com\/products\/intoo-hss-cobalt-drill-bits-set-21pcs-triangle-shank-durable-metal","provider":"GearMustHave","version":"1.0","type":"link"}