Wire the terminals, fold the Valise shut and tighten two captive assembly screws. That’s the beauty of Valise Twist-Lock plugs: the speed and ease of Valise design and the security of a locking configuration for uninterrupted power. It’s not only economical to wire these devices, they’re economical to buy. Plus, black and high-visibility yellow color choices make them ideal for use in industrial, entertainment and construction applications. Textured surface emphasizes tough, industrial design.