GasPath,
The kit I bought didn't come with any metal bits, but I did look at the display and there were several Carbide cutters there just for this kind of cutting. Also, if you find and print the $10.00 In "Black and Decker Outlet" store coupon, you can get $10.00 of free accessories for this kit..no charge
The carbide bits should easily cut the steel cases and should go through aluminum like butter..