Iptools, it does have a square hole on the (top?) I'll try to get some more photos of it. The other side has a pointed shaft with a slot in it. At first I thought it was some sort of key way, but it's too deep for that. The point also looks to be worn. I'm not very familiar with my new camera. It wanted to produce photos too large for the site to except. As soon as I get some photos smaller, I will post them.