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Irwin 9/16 in Reduced Shank Drill Bit 91136, Black Oxide Finish, 6 in Overall Length, 3 in Flute, M7 High-Speed Steel, 3-Flatted Shank | RSHughes.com
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Irwin 5/16 Heavy Duty Black Oxide Coated High Speed Steel Jobber Length Drill Bit - 67520, Tools: Auto Body Toolmart
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Irwin 15 Piece Heavy-Duty Black Oxide Coated High Speed Steel Drill Bit Sets - Mutual Screw & Supply
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Irwin 1881279 Turbomax 5 Piece Impact High Speed Black Oxide Hex Drive Set 3/32 To 5/32 Inch: Hex Drive High Speed Impact Drill Sets (042526922305-1)
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IRWIN Tools 4935643 Black Oxide Metal Index Drill Bit Set, 12pc - Drill Bit Set Hex Shank - Amazon.com
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