Kitchenaid Dishwasher - how to get off the pump/screen cover
 

Folks,

I need to inspect the pump/impeller assembly on my DW. I get the spray
arm off, but there are several screws/fasteners holding the pump cover
on. The pump cover has a large fine mesh screen.

Stupid question, but what tool do I use to get these screws out? They
look almost like hex screws but they're not.

Thanks for the help.