Concord Blades EXT06D_X 6 Inch Core Bit Extension 5/8"-11 (M) to (F)
6 Inch Core Bit Extension. This extension shaft is for use on core drill machines and dry core bits with 5/8"-11 thread. Easily extends the drilling depth to 6" deep. Use this on a Core Drill to a 5/8"-11 male thread to 5/8"-11 female thread.
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