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Own-Pea-8212 t1_j24pxpd wrote

Reply to comment by [deleted] in Help drilling a hole through kitchen countertop & flange of undermount sink for a water filter by [deleted]

Those are primarily used by electricians to create a knockout in a breaker panel and it would only work if you removed the sink.

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I'm a general contractor with 35 years of experience in construction.

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