A hammer drill, also known as a percussion drill or impact drill, is a power tool used chiefly for drilling in hard materials. It is a type of rotary drill with an impact mechanism that generates a hammering motion.

Whats the difference between a drill and a hammer drill?

A hammer drill is designed to drill holes into brick, concrete, other masonry, and even rock. ... Hammer drills don't just bore holes into masonry, though. Most allow you to turn the hammer function off, so with standard drill bits you can use them for the same tasks as cordless drill/drivers.

Is a hammer drill necessary?

This hammer effect is necessary for projects that require drilling into brick, block, concrete or any other masonry surface. ... So when set properly, a hammer drill can almost always bore the hole. If the project requires drilling in masonry, you're going to need the hammer function.