This is a resin replica of the Batarang as seen in Tim Burton’s 1989 Batman.
It has been put up for auction by a seller in the UK who states that it is “working”. By that he means this:
Folds into 4 then ‘snaps’ open with the aid of internal elastic (bungee cord). Works exactly like the ‘movie’ version with a smooth operation
Painted black with silver tips.
I have on further information on this, but it looks pretty sweet in the image above.
See a couple more images or put a bid in for yourself at the auction page link below: