Strange Harrow ! Any ideas ?

[Ploughmaster]

Spreader bar???? Whipple tree

Whipple tree? Swingletree

Stretcher

 

[JD6920s]

Stretcher

Used to have a set here, we’ve always known them as spike harrows.
Good upside down in gateways to deter the unwanted.

 

[Right-arm fast]

A friend rescued these harrows from going in a skip, but we’ve never seen any like this before. Zig zag frames are common, but these are just straight. There are hinges in the middle to join them together, and two small rings for towing, on the front and rear, but they’re offset. The tines don’t show a significant amount of wear, so don’t give an indication of which way they were pulled.
Or are they harrows, or something just made like harrows, but do another job ?View attachment 1037183View attachment 1037184

They would be good in the gate ways between fields to deter our traveling friends when hare coursing I would enjoy detangling their Subaru 4x4 estate car from it before we started combining of a morning.