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- Cut/frame opening at desired location to rough opening dimensions as shown.
- Insert letter drop (and optional wall liner) into opening.
- If necessary, drill starter holes into opening edge (and thru optional wall liner) at mounting hole locations.
- if necessary, remoce letter drop (and optional wall liner) from opening, and install anchors into mounting holes.
- Mount letter drop (and optional wall liner) into opening using #8 sheet metal screws provided.
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