Clear Switch Lock for Light Switch 4/pack by National Mfg.<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Securely locks any standard light switch in the on or off position</li><li>Clear plastic design virtually unnoticeable once installed</li><li>Prevent accidentally turning switches off on items in your home or office</li><li>Easy installation， just need a screwdriver</li><li>Goes out within 1 to 2 business days.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31KilZn0JDL.jpg" noproxy>