Tools & Gear Drills Centrebore

• 6 Pce 3-10mm 180 Degree Counterbore Set
• 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.