Flat-bottom counterbores make this rockin’ world go round. They have the MiS 1/4″ power shank for use with and impact driver, and they drill out a pilot hole and countersink in one motion. Optimal for use with lag screws, lag bolts, washer-head screws, T-nuts, etc. Sizes are marked as drill width followed by counterbore width.
Made in the USA.







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