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Irwin Tools 4935607 Titanium Nitride Coated High-Speed Steel Drill Bit Set, Pro Case, 15-Piece - Jobber Drill Bits - Amazon.com
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IRWIN Drill Bit Set, M35 Cobalt Alloy Steel Steel, 29-Piece (3018002) - Metal Cutting Drill Bits - Amazon.com
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Irwin Blue Groove Wood Drill Bit - Set Of 6 - Bedford Saw & Tool - Tools, Accessories, Woodworking Machinery
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