if I can find a replacement in plastic or aluminum I would do a ez out. The hole is threaded for the allen bolt for the bumper. The cue but is 16.5 and im trying to get it lighter. Thanks
As akaminsky suggested, the two round depressions are for a special "wrench". Some of the antique table bolt heads are like this. A good pair of needle nosed pliers will likely do the trick.
Just use a good pair of snap ring pliers. Not the cheap set from Harbor Freight as the tips of them tend to bend, but a good set of Craftsman, SnapOn, Matco, etc.. snap ring pliers and they'll work just fine.