My camera's MIA, so I can't post photos yet, but am very curious...

I have a pair of vintage rhinestone 'clips' or 'pins' from my grandmother, and I'm wondering what they are. They're lovely pieces, quite heavy and well-made, but I've no idea how they were intended to be worn. They're marked 'Eisenberg Original' which I understand is a well-regarded vintage costume jewelry maker.

They're about 1" x 1 1/2" with two sturdy, parallel, and very sharp pins across the back side that pull back and 'clip' forward with a spring mechanism similar to (but much stronger than) what is found on a typical a clip earring. The pin parts have a slight bend near the tips.

I'm thinking these are probably fur clips -- But mostly I've seen large singles rather than smaller pairs. And can anyone say how a pair might be worn?