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.

Wood Cutter. powerful wood cutting saw ...

It adds up to a hand saw that’s easy to use and works wonders on wood, plastic and laminate. You can use the saw to cut PVC pipes for plumbing repairs as well as DIY shelving projects.