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You may not need a hammer drill if you’re planning on drilling one or two very small diameter holes in brick. For holes with a diameter of 3/16-inch or less, a regular drill with a masonry bit can do the job. However, the bit will heat up quickly, and the process will take significantly longer than with a hammer drill. Prepare to cool your drill bit down in a bucket of water more often.

Masonry uses units like bricks, cement blocks, and stone with mortar between them. Mortar is generally made of sand and a type of cement. Examples of masonry include the brick or stone on a house, chimney, or freestanding wall. Concrete is a mixture of water, sand, stone aggregate, and other materials, and is poured into forms or moldings. Types of concrete applications include driveways, garage and basement floors, and poured concrete walls in basements and crawl spaces.

Drilling into brick or mortar requires the use of a masonry drill bit. Masonry drill bits appear similar to standard drill bits except for the leading tip of the bit. The tip has a bulky carbide arrow-shaped end slightly larger than the rest of the bit shaft. Standard or high-speed drill bits designed for making holes in wood or metal don’t have the ruggedness or design shape you need to drill into brick. They may not go through the brick at all, and if they do, they’re more likely to overheat, crack, or dull before you finish drilling.

Cobblestone is not a type of rock but a term for a mosaic or rock laid down as a surface. It used to be made from the closest available stone but now can be made from nearly any hard rock, as machining has made shaping the stone much easier and cheaper.