Sturdy uprights provide support for standard tool storage panels (TTS05, TTS1 and TTS2). Completely flexible and expandable system. 90 Angles can be achieved in any direction. Double sided capacity makes these models ideal for workshop partitioning. Add on to a Starter Bay (TTS50) in any direction by purchasing an Add-on Bay Pack (TTS51) and relevant size panels.Please note that PerfoWall System panels need to be ordered separately.