Not every plug can be easily unplugged from a socket. Right? Thewith a custom hole was designed to solve the issue, and built-in delivers more features.
Seungwoo Kim, a Korean industrial designer came up with the pretty useful design concept named Universal Plug. As shown in the images, it’s a two-prong plug features an open-ended hole at the center of the plug that allows you to more easily unplug it from a socket. All you need to do is just put a finger in the hole and pull instead of struggling it with your two fingertips.
Furthermore, the universal plug also features a built-in LED light. After the light switches off and the room gets dark, the luminous hole reminds you of unplugging it from the socket. Additionally, I think it also works as a Blockhead side-facing plug for Apple chargers and more by following tags.that provides a little light source at midnight. BTW, if you need a few available options, you may like to check