4FT TO 6FT ADJ EXT COLUMN UNIV Peerless ADJ Adjustable Extension Columns represent the perfect choice anytime drop adjustments are needed. The exact position of the mount and display need not be predetermined and the length can easily be adjusted at 1" increments at the time of installation and then locked into place. The Adjustable Extension Column is compatible Peerless' TV mounts, flat panel mounts and projector mounts. This product is for use with single display installations.