It is a Torx. Watch out, I believe it is a t47, odd size though. I say be careful, DC has started to use a different style of torx fitting. It is smaller and fatter at the base. OTC is the only manufacturer of these special Torxs. They are really expensive when compared to a Lsyle Torx set. A tool specialty shop should be able to get them, as long as they can get OTC tools. It is still a Torx fitting, just different enough so you have to buy more specialty tools.