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W. L. Fuller Five adjustable countersink/counterbores with 3/8" cutting dia. and matching taper point drill sizes 9/64", 5/32", 11/64", 5/16" and 13/64" for #6 to #10 screws.
Also includes 3/8" plug cutter with 1/4" shank, 3/8" stop collar to control depth, 3/32" hex key & cardboard case w/foam insert.