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4-1/4 in. Bi-Metal Hole Saw
6-1/4 Hole Saw 6.25 Bit HSS Bi-Metal Cutter for Wood Metal Plastic 1.5 Inch Deep | eBay
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HLOFIZI 6-1/4 Hole Saw 6.25 Bit HSS Bi-Metal Cutter for Wood Metal Plastic wi... | eBay
6-1/4 Inch Hole Saw with Heavy Duty Arbor, 1.2 Inch Cutting Depth HSS Bi-Metal H | eBay
Blue Boar 6-1/4" (159mm) carbide 2-1/4" deep hole saw
Amazon.com: Rierdge 6-1/4 Inch Hole Saw with Heavy Duty Arbor, 159 mm Hole Saw HSS Bi-Metal Saw Drilling Tool, 6.25 Inch Hole Cutter for Cornhole Wood Plasterboard Plywood Plastic Thin Metal (Matte