Klein Tools 31870 Heavy Duty Hole Cutter, 2-1/2-Inch Carbide Hole Cutter Cuts Stainless Steel, Mild Steel, Iron, and Copper
https://www.amazon.com/dp/B00776T3C6?tag=dmflip-20&linkCode=ogi&th=1&psc=1
Klein Tools 31870 Heavy Duty Hole Cutter, 2-1/2-Inch Carbide Hole Cutter Cuts Stainless Steel, Mild Steel, Iron, and Copper
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