I am going to replace front bumper end caps on my 99 xj. I see the two bolts that need to be removed but i'm not familiar with this other one. Will this just pop out and can be reused or will in need to replace it as well. Any help would be great. Thx

 

Looks like a rivit to me, cutting or drilling is the only way to get them off

Also, not reusable

 

That actually looks more like a large version of one of these:

And I think those can be reusable, but cheap enough to just go to your local parts store and grab one for $1 or so. You should just be able to pry it out with a flathead or needlenose pliers.