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Amazon.com: AUTOTOOLHOME 6 Pack Titanium Combination Drill Tap Bit Set Screw Tapping SAE 6-32NC 8-32NC 10-24NC 10-32NC 12-24NC 1/4-20NC : Industrial & Scientific
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Amazon.com : Williams 6-48 High Speed Tap and No. 31 High Speed Drill Set (1767), Black, Silver : Gunsmithing Tools And Accessories : Sports & Outdoors
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