Mechanical
A manual door closer stores the energy used in the opening of the door in a compression or torsion spring and releases it to close the door. Some closers allow for adjustment of the strength of the spring, making it easier or more difficult to push the door open.
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Norton 7500M Metal Cover Tri-Style Institutional Multi-Sized Door Closer
Norton 7500M Metal Cover Tri-Style Institutional Multi-Sized Door Closer Learn More$526.88
