Please take the time to find out what engine model you have to avoid purchasing this tool and then finding out that it will not work with your engine. If your engine is supercharged or car model is AMG, this tool will NOT work for your application. Commercial Grade Tool holds the Vibration Dampener Puller so the center crankshaft bolt can be removed. Tool can be used with extender pipe for ease of holding. Compare to Benz tool 1212 589 00 40 00. Tool works with balancers for these engine models only: 112, 113, 137, 155, 275, 285. Heavy Duty Commercial Grade Tool