allowing you to poke it through a small hole to make the hole bigger. In the days of skeleton keys, a jab saw was used to cut keyholes; that’s why it’s also known as a keyhole saw. A drywall ...

It has a screw shaped end point. Not as clean cut as a twist or flat bit. It is used with a hand drill Wood Hole saw Comprised of a twist drill surrounded by a large circular tube with a saw teeth.