Chief Mfg.Low-Profile Hardware Mount Black (PWRIW2000B) Ships fully assembled to save on installation time. Easily installs into Pac501 in-wall accessory (must be ordered separately) to create an Ultra low profile installation. To simplify installation, Chief's exclusive Click Connect mounting system uses a lockable latch to safely secure display to the mount. Holes are provided in the faceplate for use with a padlock or similar locking device, if desired. Allows the horizontal alignment (Roll) of the display to be adjusted up to 2 degree right or left, to level the display after installing