1st pic : Alignment tool for the shafts of a cassette rec/player chassis mold and a VW or Audi car passenger seat with a bit of photoshop (seat upholstery). 2nd pic : Alignment tool for the shafts of a cassette rec/player chassis mold and Russian mag Ecstasy. No clue for the tool adapter. Am I any close ?
From the large mount thing on the bottom left of the first picture I reckon it is something to hold a Sat Nav or MP3 player onto your dashboard using the cassette player as a mounting point.
Nah, mates, the complete rig now - does it ring a bell? I've never seen it existed in a real life back then, BTW.
Bingo! I was told that was namely a car radio anti-theft device, might have been used as a weapon I guess.. A weird looking thing, went by a slang name "fly-flap", there were also ones for 8 Track radios. This one was used for radios which didn't "swallow" the tapes.
This the weirdest cassette related thing I have ever seen , must have been effective though it looks well made. That was fun !