Huge (108 inch) Oak Stump, Broke the unbreakable bar, found part of a cinder block and a piece of meta fence post in the stump. Used the new Tomahawk 72 in material bucket for removing the pieces of stump we cut off and scooping up the grindings. This stump took almost 3 hours to grind. 43 inch swing. It took 3 passes to get it all ground!! This is in the top 3 (largest) stumps we have ground and we have been grinding since 2009. Glad this job is done!!