Deathtrap: A Thriller in Two Acts - Ira Levin

CLIFFORD. They look so old...

SYDNEY. They were made to. And apparently solid and escape-proof.

CLIFFORD. They certainly seem that way.

SYDNEY. Be my guest.

CLIFFORD. You mean put them on?

SYDNEY. Yes. That´s what I mean when you´re holding my prize pair of twelve-hundred-dollar Houdine handcuffs and I say "Be my guest": "Put them on".