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Cobalt Drill Bit Set, M35 Twist HSS Drill Bits Straight Shank, 2mm High Speed Steel Drill Bits for Drilling in Hard Metal, Stainless Steel, Cast Iron (10mm) - Amazon.com
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uxcell Twist Drill Bit Set 3mm 4mm, HSS (High Speed Steel) 4341 Titanium Nitride Coated Straight Round Shank Drilling Tool, for Stainless Steel Alloy Copper, 10pcs - Amazon.com
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Century Drill & Tool 21/64" High Speed Steel Drill Bit - High quality bit for general purpose drilling, 1 each, sold by each - Walmart.com
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