Summers is 700 or 1050.

To be honest with you, we had no problems keeping the tru-position shanks at the depth we wanted them. I'm more worried about the frame on this old 610 giving up. It held at depths of 7-8" in some of the concrete we created last spring just fine. Only problem is that it ended up in lumps the size of volleyballs. Hopefully winter and a pass with the finisher will have it like a garden.