Bordo 8 x 4.5mm 180 Degree Counterbore Drill for M4 Screws, 3871-4.0

Description

8 x 4.5mm 180 Degree Counterbore Drill for M4 Screws
Bright finish HSS-Co5 (Cobalt) for extreme tool life.
Use to enlarge the top of an existing hole to create a cylindrical-shaped opening with a flat bottom that acts as a seat for the head of a screw or wood plug.
Ideal for use with standard cap screws or socket head screws.

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