Which tool should not be used to make a hole in a concrete floor?

The high-speed drill is generally not suitable for making holes in concrete floors due to its design and intended use. High-speed drills are primarily intended for materials such as wood, plastic, or soft metals, where precision and higher rotational speed are beneficial. They lack the necessary torque and hammering action needed to effectively penetrate the hard surface of concrete.

In contrast, tools like the hammer drill, core drill, and pneumatic drill are specifically designed to handle tough materials like concrete. Hammer drills, for example, combine rotary motion with a hammering action, effectively chipping away at the concrete. Core drills are used for creating larger holes and can remove cylinder-shaped cores from the concrete, while pneumatic drills utilize air pressure to provide powerful impacts that are effective for drilling into hard surfaces. Thus, utilizing a high-speed drill for this task would likely result in inefficient performance and potential damage to the tool.