14pc Metric Counterbore and Countersink Drill Set

Aprica 

Very sharp and durable, which allows you to use it for a long time.

Counterbores:

Used for expanding general rough holes or hole processing for bolts.
Countersinks:

Specially designed to drill through steel or wood. These are most commonly used in through-hole applications. 

To suit the most common screw sizes, you can use imperial counter sunk head screws, these are a real time saver in the workshop.

Counterbore Sizes:

3mm x 6mm shank

4mm x 6mm shank

5mm x 8mm shank

6mm x 8mm shank

8mm x 12.5mm shank

10mm x 12.5mm shank

12mm x 12.5mm shank

Countersink Sizes:

10mm x 6mm shank

15mm x 10mm shank (x2)

20mm x 10mm shank

25mm x 10mm shank (x2)

30mm x 12mm shank