HIQ Parts, Center Dill Guide

Hand-made jig toa assists in drilling 1 mm diameter to
the end face and side of the round bar. Plastic round bar with a diameter of 2, 3, 4, and 5 mm.
It is only for drill blades with a diameter of 1 mm.
If you want to drill a hole smaller than 1 mm in diameter, use a drill blade with a small diameter blade at the tip on a 1 mm axis (but a total length of 18 mm or more of the blade is required for core and end face processing).

Must-read

For high-precision machining, the plastic rod itself must also be matched to the specified size.
Example: When using 2.0mm holes, it is possible to use from
2.00 to 2.05mm. By putting in a 1 mm size drill, you can remove the excess plating thickness inside the drill hole. The inner wall of the hole may be scraped and the accuracy may be lost, and the blade may not come off. Thank you for your understanding.