Prevent accidental plug-in of power cord or any sort of unauthorized action. StopPlug™ prevents unauthorized, accidental plug-in of a power cord leading to equipment and machinery. Simply insert the electrical cord through the side opening of StopPlug™ and lock it out. Thick-wall, tamper-resistant, hinge-style design completely encloses the plug and l ines up lockhole tabs; to lockout - secure with padlock and lockout tag to render the plug unusable. Write-on 'Danger' label on the outside provides additional warning and identifies the responsible person. Case is universal instop in octagon shape in safety red. The all plastic construction is dielectric and RoHS compliant and resists temperature variations.