Scott, you almost got it right!
I never even knew there were 6 point and 12 point sockets and wrenches till this happened. (I've learned a valuable lesson.) And I had just bought this nice set of Craftsman metric wrenches, too. I shredded the bolt with a 12 point box wrench. (There is no room to put a socket on it, so I had to use a wrench.)
Unfortunately, I have been hacking at it for two weekends, now, and the bolt looks like it's been chewed by a dog. I can't get any kind of wrench on it, metric or English. I have made it worse by twisting it with Vice Grips and pliers and hammering at it with a screwdriver and a chisel. It's pretty much history....
This business about 6 point sockets and wrenches is good information for those who don't already know about it. Thanks Scott.
