I'm going to ask at my vet next Tuesday when I take Jax in.
I would think a binder clip would be too strong. I work with those at work and they are usually very tight. I wouldn't try one of those on my cat. I think a clothespin would be less pressure.

We scruff our cats. Although, Bruce doesn't really know how and always does it wrong. He's afraid to hurt them. But he has to scruff Paizly so I can clip her nails. He doesn't let her hang her full body weight, he cradles her bottom on his hand. I can cut Jax's front paws, but his back ones are more of a challenge. I think a clip like this would work perfectly. I could put him in my lap with the clip on and just trim his nails in a few seconds (since his nails are still so small).

Thanks for the link Tracey!!