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WW: Electric Hinge - I Dig Hardware - Answers to your door, hardware, and code questions from Allegion's Lori Greene.
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Amazon.com: Seco-Larm SD-H412 Electric Transfer Hinge, Provides A Vandal-resistant Method For Protecting And Concealing Wires Between A Hollow Door And Door Frame, Dimensions 4.5"x4.5"x 0.125"
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