Aufheben or Aufhebung is a German word with several seemingly contradictory meanings, including "to lift up", "to abolish", "cancel" or "suspend", or "to sublate". The term has also been defined as "abolish", "preserve", and "transcend.
from wikia
Thats more of a jigsaw than a chainsaw, as it uses no chains for the teeth, rather a jittering back and forth movement. unless ranko cant identify power tools