These two-flute, countersink/counterbore 1/4″ hex-shank bits have standard twist drills. A set screw holds the drill at any projection. Counterbore size is 3/8″, except for the #10, which is 1/2″.
Sold individually, or as a set of five. Hex key included. Screw and drill sizes are listed.
Made in USA.
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