The Snug Plug Loose Outlet Plug Fix & Outlet Insert is a set of 10 electrical plugs designed to prevent the plug from being unplugged and protect outlets from damage. These glow-in-the-dark plugs are made of plastic and are suitable for use with a voltage of 110.0. With 2 wires and 2 poles, these plug inserts are easy to install and meet UL specifications for safety. Perfect for industrial and commercial settings, these snug plugs offer a reliable solution for securing electrical outlets.