The blades can be raised so that they don't dig in- so that you can just level, not break new ground- or you can lower and use them.Thanks Eric. I looked up box blade, and the ones I see have a number of blades to rip up the ground. Is that the type you mean?
I don't have snow, but rain causes rutting and pot-holing on the dirt tracks around here. I was thinking to get some gravel in occassionally, and spread it on top.