They are a bit different, sticking solid tines vibrating a bit over an inch at high speed fracturing the ground. They are a bit expensive. Is anyone using them? Especially the DO-40 model on a Dingo or other mini-track loader? Thanks, David http://www.youtube.com/watch?v=YawleSpKWaA Shown with optional seeder on a Boxer. I have a Dingo TX425.