purpose unknown homemade tool/rust garden addition

Found this thing recently discarded in underbrush and was able (nobody to say "no") to grab it and drag it home. It is now the newest addition to my 're-bar bouquet' in the rust garden... ;-) :-0

It is made of three equal lengths of rebar welded together at a slight angle using a large bent washer at a central junction, also holding a worn but formerly chrome plated cutting tool -- that part having small geared teeth on its flush-ish top and a fluted and toothed conical pointed portion as its other side. (pointing away from the angle of the three rebar 'handles') Compare to the bricks in the pic background for size reference, each handle is a foot-something long.

At first glance I thought the 'tool' in the center was a tap, but it is not. I only know that accidentally after finding one of those by itself somewhere else awhile back -- turns out it is a rotating cutter blade (of sorts) that is an inner part of an agricultural harvester machine of some kind, designed to naturally wear (and then be replaced regularly) in such machines.

Why somebody took great pains to assemble it with the 'handles' in this fashion, I have no idea whatsoever. Anybody got an idea/guess for me??