This is a set of production made Pincher Hooks that where part of a firing mechinism on the Sonar Grapple Pincher. There was sets of these on the weapon wall in the Batcave and also appear on the wall in the scene where Alfred and Bruce make their way to the cave beneath the cave to get to the prototype Sonar Suit. There was a base part that these hooks attached too. Unfortnatuely they where not part of the pieces when I got them.
