Carl Lewis grill - need special screw driver to open?

I'm trying to find a screw driver for my Carl Lewis grill. The screw head look like a slot except that it doesn't go all the way from one side to the other. it has a section in the middle that is filled. The screw driver would obviously need to have a bit missing in the middle to fit over and into the slots either side. Anyone know what this is called or if its even possible to get a driver for this kind of screw?