A chain catcher helps with electrical safety. If you choose an electric chain saw, select one that has been UL listed. Vibration reduction system . Rubber bushings between the handle and saw body or on the engine mountings help reduce the vibration you feel when sawing. This reduces fatigue.
Bumper spikes .
Most saws have large spikes on the front of the engine or motor housing that grip the wood and help hold the saw in place during cutting. Automatic chain oiling . This feature automatically oils the chain. Automatic chain sharpening . This helps keep the chain sharp while on the job.