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Amazon.com: ASNOMY 7PCS TCT Hole Saw Kit for Metal, 16-30mm Tungsten Carbide Tipped Hole Saw Hole Cutter Drill Bit with Titanium-Plated Pilot Drill bit for Hard Metal, Stainless Steel, Iron, Wood, Plastic :
Bosch 2608585886 Metal Drill Bit Hss-Co 5, 1mmx52mmx3.39In 10 Pcs - - Amazon .com
fischer 536603 Drill Bit HSS-G Sizes 1-10 mm Practical Set 10 Metal Drill Bits Grey - - Amazon.com
Bosch 2608585936 10.0mmx3.43"x5.24" Metal Drill Bit HSS-G - - Amazon.com