This is the claw of crane machine(for fun). And it is also a key ring. The Chinese words on the plate means "Stop Playing Crane Machines". Because in Taiwan, many masters of clipping dolls spend too much money through this machine, yet they don't want the stuff in those machine. They just want to clip all the things out of it to fulfill their achievement. However, this also cost them too much money. Therefore, some people will "封爪", means they don't play it anymore. It also shows that they were good at it.