3SP1 - 4.5" x 4.5" UL Listed Spring Hinge Finish:Dark Bronze This makes these doors ideal

This makes these doors ideal for stairwells in multi-level buildings when occupants must evacuate in case of emergency

May be used with any door material

3 Year warrnaty

or keys - ready to be keyed

Provides electric power transfer from the frame to the door in order to supply power to an electrified mortise or cylindrical lock

3SP1 - 4.5" x 4.5" UL Listed Spring Hinge Finish:Dark Bronze This makes these doors idealIves 3SP1 3 Knuckle Spring Hinge, Standard Weight, 4 1 2" x 4 1 2" Ives offers a variety of architectural hinges that will cover any need commercial application while also exceeding code requirements. With tested durability and consistent superior performance, Ives architectural hinges get the job done. 3 Knuckle Spring Full Mortise Hinge For use with fire doors where self closing is required Maximum door weight 120 lbs, max door width 36" Maximum