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No pilot holes required! A flat drill that can easily dig round molds!

Set of 3 with diameters from 4.0mm to 0.1mm increments!

A flat drill bit with a center guide that is fixed to a pin vise.

Unlike regular drill bits, it can dig holes with flat bottoms.

Using the center guide allows you to dig clean round holes in a more precise position.

[How to use]

Firmly insert the center guide into the center of the area you want to drill.
Rotate slowly clockwise with light force.
Dig to the desired depth.

• Set of 3: 4.0mm, 4.1mm, 4.2mm
• The shaft thickness is standardized to 3mm, so you can replace it without replacing the collet chuck of the pin vise
• Comes with a case for easy storage and carrying