{"product_id":"mckinney-mpb79-4-1-2x4-1-2-full-mortise-macpro-heavy-weight-ball-bearing-hinge-five-knuckle","title":"McKinney MPB79-4-1\/2x4-1\/2 Full Mortise MacPro Heavy Weight Ball Bearing Hinge, Five Knuckle","description":"\u003ch2\u003eMcKinney MPB79-4-1\/2x4-1\/2 Full Mortise MacPro Heavy Weight Ball Bearing Hinge, Five Knuckle, 4-1\/2\" x 4-1\/2\", Square Corner\u003c\/h2\u003e\u003cp\u003eThe McKinney MPB79-4-1\/2x4-1\/2 is a full mortise, five knuckle ball bearing hinge built for high-frequency, high-traffic openings where durability matters most. Part of the trusted MacPro line, this hinge measures 4-1\/2\" x 4-1\/2\" and features a square corner design that fits standard commercial door and frame preparations. The two ball bearings provide smooth, reliable movement while supporting heavier doors over time. Constructed for consistent performance, it delivers the dependable operation commercial buildings demand. Whether you're outfitting new construction or replacing worn hardware, the MPB79 offers a durable, code-conscious solution suited to schools, offices, healthcare facilities, and other demanding environments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFull mortise design for standard commercial door and frame preparation.\u003c\/li\u003e\n\u003cli\u003eFive knuckle construction for balanced load distribution and a clean appearance.\u003c\/li\u003e\n\u003cli\u003eTwo ball bearings deliver smooth, quiet operation under heavy use.\u003c\/li\u003e\n\u003cli\u003eHeavy weight rating supports larger and higher-traffic doors.\u003c\/li\u003e\n\u003cli\u003eSquare corner configuration matches typical hollow metal frame preps.\u003c\/li\u003e\n\u003cli\u003e4-1\/2\" x 4-1\/2\" size fits a wide range of commercial openings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Specifications\u003c\/h4\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMcKinney\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMPB79-4-1\/2-4-1\/2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFull Mortise Ball Bearing Hinge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMacPro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKnuckle Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFive Knuckle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeavy Weight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBearing Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBall Bearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCorner Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSquare Corner\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEach\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLimited Warranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch4\u003eTechnical 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