6 Inch Core Bit Extension 1-1/4"-7mm (Male) to 1-1/4"-7mm (Female) shaft is for use on core drill machines and dry core bits with 1-1/4"-7 threaded. Easily to extend the drilling depth to 6" deep.

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6 Inch Core Bit Extension 1-1/4"-7mm (Male) to 1-1/4"-7mm (Female) shaft is for use on core drill machines and dry core bits with 1-1/4"-7 threaded. Easily to extend the drilling depth to 6" deep.

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