No, not the power tool, a saw that is mounted onto an armored glove.
It needs to be on both hands.
When you equip them they need to have a small spin up time.
It needs to deal very light damage relatively fast.

Leftclick will bring around a curved hit, level with the shoulder. > regular damage
Rightclick will be an uppercut. > Very heavy damage
The left hand should idle until you click rapidly.
Holding down the mouse will shove your hand into the enemy and do grinding damage. > light, rapid damage