A circular saw blade attachment for a power drill that cuts circular holes of a set size into wood, plaster, concrete and more. Different saw blades create differently-sized holes.

To use, select the appropriate hole size, mark the center of the area to be cut with a punch, and attach the saw to a drill in the same way you would attach a drill bit. Then drill the marked spot until the hole saw comes into contact with the material, ensure the saw is lined up flat against the surface and drill until the hole is cut. Keep the saw spinning to remove it from the material.