McKinney MPB79-4-1/2x4-1/2-CC8 Electrified Full Mortise MacPro Heavy Weight Ball Bearing Hinge, Five Knuckle, 4-1/2" x 4-1/2", [8] Wires With Concealed Circuit, Square Corner

The McKinney MPB79-4-1/2x4-1/2-CC8 is an electrified full mortise hinge from the MacPro series, engineered to carry electrical current through the door without exposing wiring at the door edge. Built with a five knuckle, heavy weight ball bearing design and measuring 4-1/2" x 4-1/2", it delivers reliable performance on high-frequency and heavier openings where access control, electric locks, or monitoring devices require a power transfer path. The concealed circuit routes eight wires between the frame and door leaf, keeping the transfer completely hidden for a clean appearance and added tamper resistance. This hinge suits commercial applications that demand both durability and integrated electrical function.

Features

• Electrified full mortise design transfers power between the frame and door leaf.
• Concealed circuit hides the eight-wire transfer for a clean, secure look.
• Heavy weight construction handles high-frequency and heavier door applications.
• Five knuckle ball bearing configuration ensures smooth, long-lasting operation.
• 4-1/2" x 4-1/2" size fits standard commercial door and frame preparations.
• Square corner profile for typical mortise installations.

Functional Details

The concealed circuit hinge carries eight electrical wires through the barrel and internal channel, allowing power and signal to pass from the frame side into the door without any visible cabling. This supports powered locks, sensors, and other electrified door hardware while maintaining a tamper-resistant, finished appearance.