Using a hole saw in a powerful drill, even a cordless one can be dangerous to even the most experienced carpenters and joiners. This is because these particular types of bits have a tendency to bind-up and twist the user’s wrists.
After your wrists and hand have been twisted and you’re ready to throw the tool ...you realize that the saw also left a series of teeth marks on your nicely finished wood!
Well there is a solution! Use a drill with a "Torque Setting" and simply set the clutch to a low number and gradually work it up higher until the bit is cutting well. The bit suddenly binds up again then the torque control will kick in as seen in the video and your wrists and finished wood will be safe!
Check out a different kind of saw, the Sliding Compound Mitre Saw.