Examine the Result and Understand Efficiency

What happens here

After drilling, examine the resulting 3/4-inch metal slug, which should be cleanly cut and easily ejected. The demonstration emphasizes that this precise hole was achieved in less than 30 seconds. The remarkable speed is attributed to the drill bit's design: it only cuts the circumference of the hole, leaving the center material intact (which becomes the slug). This significantly reduces the volume of material that needs to be cut and removed, making the process much faster and more efficient than traditional drill bits that grind away the entire inner area.

Goal: Understand why the specialized hole cutter is so fast and efficient.