The Sigma ProConnex Clamp Type Cable Connectors are used to terminate NM Cable or Flexible Cord to a 1/2-in knockout in a dry location box or enclosure. These die-cast zinc connectors feature a reversible locknut to preserve grounding. Highlights: The Sigma ProConnex Clamp Type Cable Connectors are designed for terminating NM Cable or Flexible Cord. They fit into a 1/2-inch knockout in a dry location box or enclosure. Made from die-cast zinc for durability. Equipped with a reversible locknut to maintain grounding integrity. Suitable for use in dry locations. Specifications: Dimensions (Overall): 7.5 inches (H) x 4 inches (W) x 12.75 inches (D) Weight: 5.3 pounds