SDC Access Control 4 Wire Hinge PTH-4Q FPTH Power Transfer4 Wire Hinge SDC Access Control Hinge PTH 4Q FPTH Power Transfer SDC Security Door Controls PTH 4Q FPTH Power Transfer Hinge 4 Wire Electric Power Transfer Hinges provide a concealed and vandal resistant method for running wires from the frame to doors equipped with electric locks and exit devices. UL 10B Listed for 3Hr fire rated doors 800,000 cycles. 8 Times UL Test Criteria Wire Replacement Warranty Standard Weight, 5 Knuckle Hinge F When it comes