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Amazon.com: 2 Inch BI-Metal Hole Saw with Arbor and Replacement Pilot Drill Bit, 51mm Dia Hole Cutter for Easily Drilling Wood, Plastic, Thin Metal : Tools & Home Improvement
3" Hole saw
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26mm HSS Drill Bit Hole Saw Cutter for Metal Alloy Wood - 26m - Overstock - 25415301
3" (76mm) Carbide‑Tipped Hole Saw for Wood & Metal DHS3000CT
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Bosch 4-1/8 in. MultiConstruction Carbide-Tipped Hole Saw for Wood, Masonry, Metal and Fiber Cement HTC412 - The Home Depot
Bi-Metal Hole Saw Kit
50mm To 110mm Bi Metal M42 HSS Hole Saw Cutter Drill Bit For Wood Plaster Board | eBay