The table saw is the most versatile piece of equipment in the shop. But what is it? The table saw is a circular saw blade protruding through a steel table top that is attached to a motor, either by a belt or directly to the unit. The table saw blade size can vary in the diameter of the circle. Also, the number of teeth on the blade can vary. The blade can be moved up or down and angled to different degrees required, left or right.