Does anybody know where these came from?

EDIT: pic doesn't seem to be loading. Here's the link:
DSC03136 | Flickr - Photo Sharing!
For some reason I always had it in my mind they were Mego accessories from a playset like the Batcave or the Batcopter (probably because my Batman was the one always putting them to use). But after doing a little research, that seems to not be the case. Now I'm wondering if they are even Mego at all. And if not, then what the heck are they from? I've had these in my toy storage for decades but if they aren't Mego I can't for the life of me think of any other toys I had that they might be from.
Anybody happen to know?
(p.s. I know the black shoe doesn't belong with the rest of the stuff. Just happens to be in the pic randomly)
EDIT: pic doesn't seem to be loading. Here's the link:
DSC03136 | Flickr - Photo Sharing!
For some reason I always had it in my mind they were Mego accessories from a playset like the Batcave or the Batcopter (probably because my Batman was the one always putting them to use). But after doing a little research, that seems to not be the case. Now I'm wondering if they are even Mego at all. And if not, then what the heck are they from? I've had these in my toy storage for decades but if they aren't Mego I can't for the life of me think of any other toys I had that they might be from.
Anybody happen to know?
(p.s. I know the black shoe doesn't belong with the rest of the stuff. Just happens to be in the pic randomly)
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