Wooden bench with a hole in the middle. The bolts go all the way through the legs and it is very heavy. Found in the basement of an old farm house

The questioner said: Wooden bench with a hole in the middle. The bolts go all the way through the legs and it is very heavy. Found in the basement of an old farm house
And send this images:

Some of the people answers were:
1. The rounded corners on the ‘legs’ make me think this was/is an improvised agricultural tool. Trammell? Furrower? Thought was put into this fabrication, I doubt it was just knocked together.

2. That’s a lot of bolt going on. This suggests that this device had to be reliable under some considerable strain. I notice that the four bolts near the hold are countersunk while the bolts at the outside edges are not. I wonder if whatever went into the hole also needed a flat surface around it.

3. I think an attachment for a diy wooden vise. Looks like it might slip onto a 4×4 with some sort of cotter pin. Check how easily 2x4s etc slip into those up rights could have been a jig for holding lumber to cut with a handsaw. I vaguely remember my grandpa having something like that for cutting lumber with a handsaw.