I'd say that these little items ( also known as 'Crapalinas' , 'Tippers' , 'Crushers' & 'Widow-makers' by mechanics during the 1950's & '60's) are from foreign passenger cars (non-U.S. , excepting possibly the Corvair) of a generally small stature .
These items also included a single-pinned 'folding/locking' rod/crank handle , with a 'spoon' shaped head that was inserted into the slotted receiver lug on the jack (AKA 'The Knuckle-cracker') .
They could be painted & used for display , if you'd care to ; possibly to be included in a Ralph Nader shrine .