The KROM-HBB79C26D454ECT428 is a 5 knuckle, standard duty, 4.5" X 4", 4 wire 28 gauge (ECT428), satin chrome (C26D), full mortise power transfer ball bearing hinge. It conforms to ANSI/BHMA standards and is UL listed. Molex connectors (unassembled) and wood and machine scews are included. 1 year warranty.