Hager BB1279 Standard Weight Ball Bearing Hinge
4-1/2" x 4-1/2" Five Knuckle, Full Mortise, Steel with steel pin.
Finishes Available: Bright Chrome, Antique Bronze Oil, Antique Bronze Lacquered And Satin Bronze
For use on medium weight doors or doors requiring medium frequency service. Two ball bearings. Complies with NFPA80 requirements for use on fire rated door assemblies.