What Does Selina Use As Her Talons?

[lifesabitch]

I found out years ago after searching through countless fabric web sites. 

I thought they were seam strippers, but it doesn't look to be the case.  Whatever they were, I believe they were nicknamed, cat claws.  What an amazing idea on the part of the costume designers.

Anyway, does anyone know what they're called?  It's definitely some sort of thing used for fabric.