The Aberdeen Series return is non-handed. It is not free-standing, and requires connection to a credenza, desk, or extended corner. The mouse hole in the modesty panel is for cable pass through. The modesty panel is flush. There is one grommet in the surface, standard. It has a 1 5/8" thick work surface. The full-height, vertical grain modesty panel is included. Mayline Heritage began in 1939, manufacturing drafting tables as the Engineering Supply company.  today Mayline is one of the leading mid-market contract furniture Manufacturers in the U.S., offering a complete collection of office furniture, filing, storage, and customized solutions.  Mayline understands you have unique workplace needs, so every effort is made to optimize the environment to fit both your style and your space.