A power cutting tool fitted with a metal cut off wheel can perform this task just as well as the handheld rotary tool.
Best cut off wheel for aluminum.
Mercer industries 633020 type 27 cut off wheel for aluminum and other non ferrous metals 4 1 2 x 045 x 7 8 50 pack 4 0 out of 5 stars 1 105 32 105.
Avoid using cutting bits instead of cut off wheels however as they become.
Cut off wheels zirconia alumina.
For cutting masonry concrete stone ceramics marble and non ferrous metals.
Goyonder 50 pack 4 5 cutting wheel for metal stainless and steel 4 1 2 x 0 045 x 7 8 inch ultra thin cut off wheel for angle grinders blue 4 6 out of 5 stars 141 23 74 23.