Though not the fastest of the bunch, Craftsman’s hole saws cut smoothly through wood, metal ... Blades designed with aggressive teeth angles and deep gullets that can remove more material ...

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.

Most jigs, however, are considerably simpler and more static than this CNC-controlled scroll saw add-on that makes cool wooden spirals ... inserted into a through-hole, the saw slowly cuts a ...