I worry about bruising the skin. Those clips exert a powerful force. And scruffing doesn't work on all cats.

I do understand that a feral cat might need other types of restraints. It's okay for mother cats to pick the kitty up by the scruff, but she can't exactly hold the kitten in her front paws.

We can do better.

Mine don't need it since they imitate an armadillo when afraid.

I would rather hold my cat for you while you trim his nails than let you put a clip on his neck.