My tractor is pretty tiny -- NH TC18 (18 HP) with a 12LA loader. I cut the scarifier beam off a damaged 6' box blade and used it, along with the scarifier teeth, as my digger. (see attached). It works pretty good. I can pop 3" to 4" pines out of the ground, and worried a pine with about a 6" trunk by loosening the roots, pushing on the trunk, and finally flipping it over by the roots. Mostly, I use it on the noxious Braziilian pepper trees that threaten to take over Florida.