Amazon.com: uxcell 24mm HSS Drill Bit Hole Saw Cutter for Metal Alloy Wood : Tools & Home Improvement
75mm HSS Drill Bit Hole Saw Cutter for Metal Alloy Wood - Overstock - 28846886
Amazon.com: HSS Hole Saw Kits, High Speed Steel Drill Bits Hole Saw Opener Cutting Tool for Metal, Copper, Stainless Steel, Iron Plate (thick less than 1/9"(3mm)) Big Size 9/15”(15mm) ~ 2-4/25”(55mm) Set