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20 HSS Threaded Drill Bit 1-1/4" length, Pack of 12 pieces, MADE IN THE USA | Brown Aviation & Aircraft Tools
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Aircraft Tool Supply Threaded Drill Bits #40, 30, 21, 12 (4-Pack): Drill Bit Sets: Amazon.com: Industrial & Scientific
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Amazon.com: 3/16 HSS Extra Long Threaded Shank Adapter Drill Bit, Michigan Drill Series 605 : Industrial & Scientific
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5pcs Hss Machine Hand Screw Thread Tapper M3 M4 M5 M6 M8 Metric Plug Tap Drill Set Cutting Drill Bits - Tap & Die - AliExpress
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Precision Twist Drill 045630 | #30 Diameter 1-1/4" OAL 135 Degree High Speed Steel Steam Oxide Threaded Shank Drill Bit - All Industrial Tool Supply
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