This adaptor plate attaches an Ergotron mount with a 75 x 75 mm interface to a display with a 100 x 100 mm hole pattern. Note: All VESA MIS-D compatible Ergotron products include interfaces for both 75 x 75 mm and 100 x 100 mm hole patterns. Benefits – Easy to install. Includes thumb screws for tooless attachment to display – Strong, steel construction