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55145 Carbide Tipped Shankless Counterbore with Slow Spiral Drill, 1-1/8 Dia x 1/2 Drill Dia x 1/2 Drill Shank
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1 1/2" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 3/8" Shank Diameter, 3 Flutes, 2 3/4" OAL, (1.5" Diameter, 1-1/2), 52248, USA Made: Amazon.com: Industrial & Scientific
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Amazon.com: Chiloskit 5pcs M3-M8 Pilot Slotting Counterbore Mould End Mill Cutter Solid Slot Countersink End Mill Drill Bit : Industrial & Scientific
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