Had a set of wore out ones in our M2, dealer talked me into changing them out for wide spaced tungsten set of Agco's. This was done in the summer, then fall came and was disappointed in the Agco bars, tried to get the old ones back but had already been sent in as a core set to a re-builder. They seemed to have more swinging weight and would hammer right thru bean stubble. Highly recommended them even when worn out.