Compac Unit The Keystone Compac Unit is the perfect choice where the deep embedment length of the Standard unit is not required. An installer's favorite, its lighter weight and shorter tail design makes it easy to handle for smaller walls. Compac II Unit Rockface Compac Unit Straightface DOWNLOADS: Compac Unit Specifications - Mac Compac Unit Specifications - PC Typical Compac Unit Details - DWG Typical Straightface Compac Unit Details - DWG Typical Compac Unit Details - PDF Typical Straightface Compac Unit Details - PDF