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ROOCBIT Core Box Router Bit Set Double Flute Round Nose Router Bit Woodworking Tool Round Groove Router Bit 1/2 Inch Shank -(5/8" 3/4" 7/8" 1" 1-1/8") 5PCS - Amazon.com
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Magnate 814 Core Box Router Bit - 1-3/8" Cutting Diameter, 1/2" Shank Diameter - Edge Treatment And Grooving Router Bits - Amazon.com
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Amana Tool 45924, Core Box (Round Nose) Carbide Tip bit, 2 Flute, 1/4 Shank, D - 1, h - 5/8, R - 1/2, d - 1/4, L - 1-3/4
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