These are the highest quality and most convenient cans to install in any prefab space. Do all the wiring first, pull the wire through the cutout and make all the connections (which are quick connect). Then place the jar in the cutout (ensure all the black retaining clips are removed (inserted into the jar) and press flush against the drywall and you can slide each clip up from the inside. If you don't get them all the way Use a flat screwdriver to push the clip until it clicks into place.
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