{"product_id":"20-set-78x78mm-2020-aluminum-extrusion-corner-bracket-heavy-duty-90","title":"20 Set 78x78mm 2020 Aluminum Extrusion Corner Bracket - Heavy Duty 90","description":"\u003cp\u003eIn this review the 20 set 78x78mm 2020 aluminum extrusion corner bracket is examined for builders who need reliable 90 degree connections for 20x20 profile frames. The bottom line: this kit is best for hobbyists and light industrial users who want a cost-effective, sturdy connector set that includes hardware and a wrench, with the single biggest reason to buy being its thick 7mm construction which adds noticeable rigidity to small machine frames and enclosures.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete kit:\u003c\/strong\u003e The package includes 20 brackets, 80 screws and nuts, and a wrench so assembly can begin immediately without sourcing fasteners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThick construction:\u003c\/strong\u003e At 7mm thick and made from aluminum alloy, the bracket adds solid support where two 20x20 profiles meet at a 90 degree angle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-hole design:\u003c\/strong\u003e Each bracket has four mounting holes to spread load and improve joint stiffness for frames and machine enclosures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for 6mm slot profiles, the connector fits most 20 series aluminum extrusion systems used in 3D printers and CNC machines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile use:\u003c\/strong\u003e Useful for building industrial frames, roof racks for hiding wires, robotics projects, and common workshop fixtures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe bracket set is aimed at DIY makers, small workshop builders, and light industrial users assembling 20x20 aluminum extrusion frames for 3D printers, CNC routers, laser cutters, or general purpose enclosures who value a ready-to-use pack with matching fasteners. Its heavy 7mm thickness makes it especially suited to projects where joint rigidity matters.\u003c\/p\u003e\n\u003cp\u003eThose working with larger profiles, nonstandard slot widths, or needing stainless hardware for outdoor corrosion resistance should look elsewhere, since this kit is tailored to 20 series aluminum profiles and includes standard alloy fasteners rather than specialized corrosion-resistant options.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWell-made and sturdy brackets that increase frame rigidity thanks to 7mm thickness.\u003c\/li\u003e\n\u003cli\u003eComes as a full kit with 80 screws, nuts, and a wrench so most builds can start right away.\u003c\/li\u003e\n\u003cli\u003eSimple four-hole pattern makes alignment and assembly straightforward for common 20x20 builds.\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 may find fit varies with certain brands or slightly different slot tolerances, so verification is recommended before large builds.\u003c\/li\u003e\n\u003cli\u003eFasteners are standard alloy; projects needing marine-grade or specialty bolts will require replacements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e20 brackets with 80 screws and nuts and 1 wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBracket size\u003c\/td\u003e\n\u003ctd\u003e78x78mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile fit\u003c\/td\u003e\n\u003ctd\u003e20x20 series aluminum extrusion (6mm slot)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminum alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e7mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e4-hole right angle connector for 90 degree joints\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThis bracket kit is a practical, value-focused choice for makers and small shops building with 20x20 aluminum extrusion. It delivers sturdy, easy-to-assemble 90 degree joints thanks to its 7mm thickness and included hardware, making it good value for projects where standard alloy hardware and a simple heavy-duty connector are sufficient.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill these fit any 20x20 profile?\u003c\/strong\u003e\u003cbr\u003eThey are designed for 20x20 series with a 6mm slot and fit most common brands, but slot tolerances vary so test one bracket if using an uncommon profile.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre corrosion-resistant fasteners included?\u003c\/strong\u003e\u003cbr\u003eThe kit ships with standard alloy screws and nuts; users who need stainless or marine-grade hardware should replace the included fasteners.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan these support printer and CNC frames?\u003c\/strong\u003e\u003cbr\u003eYes, the 7mm thick aluminum construction is well suited to 3D printers, CNC routers, and laser cutter frames where rigid 90 degree joints are needed.\u003c\/p\u003e","brand":"BLCCLOY","offers":[{"title":"Default Title","offer_id":48260188373211,"sku":"B0BZN218PJ","price":41.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71jDCTFMB5L._AC_SL1500.jpg?v=1776599967","url":"https:\/\/gearmusthave.com\/products\/20-set-78x78mm-2020-aluminum-extrusion-corner-bracket-heavy-duty-90","provider":"GearMustHave","version":"1.0","type":"link"}