Geared continuous hinge - Wikipedia

See how a SELECT concealed geared continuous hinge works

Roton 780-257HD Continuous Geared, Full Surface Heavy-Duty Double Hinge for hanging two doors from a fixed mullion by Hager Companies.Available in

Roton 780-257HD Continuous Hinge, Full Surface Double Hinge

SELECT Geared Continuous Hinges

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SELECT Geared Continuous Hinges

Fire rating up to 3 hr. metal and 90 min. wood composite (with studs) Door Reinforcement not required Dril-Kwik screws and sex bolts Standard lockside

Hager 780-157 Series Aluminum Heavy Duty Fire Rated Roton Continuous Geared Hinges, Full Surface, Clear Anodized, 83 Length (Pack of 1) - 48059

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