Excavator Fork Attachment Jcb , Digger Tractor

Jcb excavator attachment ?? I know not what this is or was used forIt has been left on my yard since i had some excavation work done at the beginning of last year,asked every one and no one seems to know who left it. So.. classifieds board it is!! Perhaps some one out there may know and can make good use of it.Any questions or answers please let me know.