Yesterday it was 40 degrees here in southern WI, so I thought I would try some woods hunting. Well, there was about 2" of frost, and I tried to be careful, but my diggers did not hold up well. The top one I have been using for 10 years so far, works great in normal soil. It got bent up going through the frost, so I tried my backup, a cast aluminum digger. That one did not fare well either. I did find one wheat cent.