The ACC556 Cathedral Ceiling Adapter can be attached to a finished ceiling (wood joists above drywall) using the two washer head wood screws included, or a structural ceiling (concrete) using concrete anchor accessory kit ACC200 (sold separately). Features:
Mounts to cathedral or vaulted ceiling
120°(±60°)of adjustment
Unit has 1 1/2" 11.5 NPT fitting for attachment of extension column