Mercedes Benz (M112/M113) Crankshaft Harmonic Balancer Pulley Holder Holds vibration damper when loosening and tightening center crankshaft bolt. Handle can be extended with commercially available pipe, e.g. 3/4 din 2441, diameter 26.9 x 3.25 mm, length 1000mm. Equivalent: 112 589 00 40 00 Applicable Engines: 112 , 113, 137, 155, 275 & 285