Those spikes pivot up while the spearhead is being shoved into something.
Then, when the action is reversed, the spikes pivot down and drag something backwards. Stacked square bales? Nah, probably not.
318 John Deere, 4200 John Deere, 1947 John Deere "M"
I'm leaning in DirtRoad's direction. An anchor point of some sort. Look's to me like a "one use and done". With those barbs(?), what ever that bad boy penetrates, seems like it's there for the duration! ~S
Theres something odd. In shot 1 the 'lugs' are up and the barbs are hanging down. In shot 3 the lugs are down but the barbs are still hanging down. So it appears the bar has been turned over between shots 1 and 3.
So, is shot 2 upside down ?
Anyway, it looks like its designed to work in a horizontal position. The lugs and bolts dont look particularly robust but possibly it spears and rips something.