A hammer drill is a type of drill that is design for drilling into concrete, tile, cement blocks and other similar type materials. As the drill chuck spins, the bit moves in and out in a jack hammer type motion. When using a hammer drill, it is important to use the proper type of bits designed for drilling into concrete type materials. While it is possible to use masonry bits in a standard drill, a hammer drill will allow the same holes to be drilled much faster and easier with less user and tool strain.  A good option for some would be to purchase a drill that will allow you to switch from standard drilling to a hammer drill function.