There are times when you need to remove drywall to fix the infrastructure beneath it. I had to do some plumbing work that was behind drywall. Normally, I would use a saw and cut an opening. However, the opening would be uneven and rough. A drywall circular cutter offers an advantage over traditional methods. It has a bowl to catch the dust, and in addition, it cuts a clean circular cut that is easy to patch. This particular cutter is about 8 inches, the perfect size for me to work on the plumbing behind the drywall.