A. It mostly happens because the kerf (the cut slot made by the saw) tightens around the blade. It’s most common with thin ...

There aren't any commercial circular saws that are bigger, but one other matches its size, the Skil 16-5/16-inch Magnesium Worm Drive Circular Saw.

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.