Killark Versamate Series metal back boxes are designed for solid surfaces like stone, brick and breeze block walls, protecting electrical conduits against short circuits and fire hazards. These units come integrated with green grounding screws, providing a safe electrical path to the ground and preventing shock. They also feature unique blind receptacle mounting holes to prevent moisture ingress via thread cavities from damaging the inner components. Selected models (dead end black boxes) feature non-metallic housing with a 15 degree angle to offer optimal wiring room while grounding the conduit.