These Master Lock Lockout Electrical Plug Covers surround the electrical plug and prevent accidental reconnection. Rotating design enables installation in confined spaces. Zenex™ construction withstands chemicals and extreme temperatures ranging from -57°C to +177°C Complete with high-visibility safety label: DANGER - DO NOT REMOVE. Padlock is not supplied. This small Lockout Electrical Plug Cover is suitable for 120 to 240 volt electrical plugs.