remove bay...help

I am about to install a water cooling system into my antec case, the case has 4 5 1/4 and 6 internal 3 1/2 drive bays. and the 3 1/2 bays are grouped in threes. the box that these are in is removeable, but there is still a thin metal piece that sticks out, this is facened by somesort of bolt, the front of the bolt is flat and the back is like a round circular thing that goes around it like a nut, or bolt, but there is one problem the circular thing cannot be undone by any tools that i can find, because the opening is round, it is almost like the ones that have like 5 differant sides, but this one has none, does anyone know of any way to get these off, bc i need the extra space for the water cooling sysem.

It sounds like you are talking about a rivet, the only way I know og removing these is to drill them out!

You can also wack the head off them with a small chisel. I do it all the time.

I drill it then wack it with the chisel!

your not talking about the levers that latch your cages into place are you?