Best way to cut a nice 9mm by 5mm slot in 2mm thick aluminium?

Twin Slot Shelving · Storage · Tool Storage · Storage Bins · Garden Storage · Storage Erbauer Straight Shank Metal Drill Bits 5mm x 86mm 5 Pack

FORMAT Slot drill , 3 cutting edges, DIN 327, HSS Co8, bright Design: From Ø mm with centre cut Application: Can be used for milling

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goonies return slot 5mm Diameter Ball Nose Slot Drill 2 Flute HSS High Speed Steel 8% Co TiAlN Coated