Which item is specifically designed to protect hands when dealing with extreme temperatures?

The item designed specifically to protect hands when dealing with extreme temperatures is known as "hot hands." These are often heat-resistant gloves or sleeves that provide insulation against hot surfaces or materials, ensuring safety for the user when handling hot objects or chemicals. They are typically made from materials that can withstand high temperatures without conducting heat to the skin, making them essential in laboratory and industrial settings where thermal hazards are present.

In contrast, the other items listed—beakers, flasks, and graduated cylinders—are laboratory glassware or containers that serve different purposes, such as measuring or holding liquids, but they do not provide any protective function for the hands. While these items are critical tools in the lab for conducting experiments and measurements, they do not offer the needed protection against extreme temperatures that hot hands do. Therefore, the suitability of hot hands as a protective measure in high-temperature situations makes it the correct choice.