What are robot hands called?

Sure, here's a possible description in the tone of a questioner, based on the given paragraph: "I'm curious, could you tell me what are robot hands commonly referred to as in the world of robotics and automation? I've seen them used in a variety of applications, from manufacturing to research, but I'm not quite sure of the proper terminology to use when discussing them. It would be great if you could shed some light on this for me.