When drilling a hole in brick or masonry, which drill bit is recommended?

When drilling in brick or masonry, a carbide bit is the most effective choice due to its specific design and material properties. Carbide bits are manufactured with a hard tungsten carbide tip, allowing them to easily cut through the dense and abrasive materials that comprise brick and masonry. This durability is crucial as it helps prevent the bit from dulling or fracturing while working with these tough materials.

Conversely, other types of bits listed are not suitable for masonry applications. An auger bit is designed primarily for drilling into softer materials like wood and is not capable of handling the hardness of masonry. A hole saw, while useful for creating larger openings, typically relies on a different cutting action that is not optimized for brick or masonry. Lastly, a countersink bit is meant to create a conical shape for screw heads in wood or other soft materials, making it entirely inappropriate for use on masonry surfaces. Therefore, while each of the other options serves specific purposes, the carbide bit stands out as the proper tool for drilling into brick or masonry.