The OEM Master Lock 487 Rotating Safety Lockout is designed to surround electrical plugs and protect against accidental reconnection. It fits 2-prong 240 and 120 volt plugs, accommodating sizes up to 2-1/4" diameter x 3-1/4" with a cord diameter of up to 3/4". The outward/inward rotation feature allows for easy application and storage. This product includes high-visibility, permanent safety labels in English, Spanish, and French.