'- Open design offers unrestricted airflow- Large cable exit holes on back surface- Keyhole mounting slots on 16-in. centers accommodate up to 3/8- in. dia. mounting fasteners (not supplied)- Heavy duty hinges are welded to frame- Hinge provided for every two rack unit spacing- One rack unit model has half-size hinge- Provides access to rear of equipment- 12-24 rack mounting screws (package of 20) included with assembly- Wall mounting hardware not included